Current Fellows

July 2020 – June 2021

First Year Fellows

Kristopher Clark, MD

Dr. Kristopher Clark completed undergraduate school at New York University where he obtained a B.F.A in Film and Television Production. He then decided to pursue a career in medicine and obtained his M.D. from the State University of New York (SUNY) at Buffalo, where he was inducted into Alpha Omega Alpha (AOA) and graduated Summa Cum Laude in 2016. He then moved to Boston to complete his internal medicine residency and serve as Chief Resident at Boston University/Boston Medical Center. Dr. Clark served as co-chair of his House Staff Quality Improvement Council where he participated in numerous quality initiatives at Boston University and the Boston VA. In his spare time, he enjoys travel photography, reading epic sci-fi and fantasy series, and learning to play the banjo.

Tony V. Macedonia, MD

Dr. Tony Macedonia obtained his B.S in Biology from John Carrol University in 2007 and his M.D. from Georgetown University in 2011.  He was then selected to complete a General Medicine Officer tour as a Naval Flight Surgeon where he completed five years of active duty service in the Unites States Navy fulfilling his Health Professions Scholarship Program.  After his service, Dr. Macedonia returned to the University of Colorado to complete residency and then serve as Chief Resident.  During that time, he worked at National Jewish Health in the Division of Environmental and Occupational Health Sciences investigating deployment related lung disease.  In his spare time, he enjoys aviation, American history, and watching Steelers and Notre Dame football.

Sridesh Nath, MBBS

Dr. Sridesh Nath obtained his MBBS at the Medical College Thiruvananthapuram in India in 2015. He completed his residency and served as Chief Resident and Ultrasound Instructor at SUNY Downstate Medical Center. He was also a member of the SUNY Research Track and Scientific Review committee as well as Alpha Omega Alpha (AOA). Dr. Nath’s research in COPD initiated a quality improvement project which ultimately led to the implementation of institutional policy on oxygen supplementation. He was also awarded a travel grant to augment his research later resulting in a manuscript in the AJRCMB. Dr. Nath fluently speaks English, Hindi, Malayalam, and Tamil. During his spare time, he enjoys learning karate, playing table tennis, model building, and riding motorcycles.

Chukwudi Onyemekwu, DO
Dr. Chuk Onyemekwu completed his B.A in Psychology at Vanderbilt and then continued his training at Touro College of Osteopathic Medicine where he obtained his D.O. in 2017. Dr. Onyemekwu completed residency at Montefiore Medical Center where he served as co-chair of the Minority House-staff committee. During his training, he was awarded the New York Times Scholar and Posse Foundation Full-Tuition Leadership Scholarship. His research in residency has focused on frailty as a predictor of health care utilization in the critically ill. In his spare time, he enjoys cooking, biking, and martial arts (wing tsun).
Josiah Radder, MD, PhD

Dr. Josiah Radder obtained his B.S in Biology and Biochemistry and a B.A. in Religious Studies from Arizona State in 2007.  Dr. Radder completed his M.D./Ph.D from the University of Pittsburgh in 2018 where he pursued the Research Pathway Fellowship Track.  His research in Dr. Steven Shapiro’s lab identified novel genes likely contributing to the pathogenesis of COPD which has been published in numerous manuscripts.  Dr. Radder has visited 104 countries on every continent except Antarctica and can fluently speak English and Japanese.  In his spare time, he enjoys spending time with his daughter, baseball, and designing home electronics.

Kristen Raffensperger, MD

Dr. Kristen Raffensperger obtained her B.S in Chemistry from McGill University and her M.D. from Drexel University.  She was a member of Alpha Omega Alpha (AOA) and the Pathology Honors Society.  Dr. Raffensperger completed her residency training at the University of Pittsburgh where she was a member of the House Staff Council and worked in the Vascular Medicine Institute lab with Dr. Imad Al Ghouleh.  Dr. Raffensperger was also awarded the Intramural Research Training Award Fellow and completed two years of training at the Urologic Oncology Branch of the National Cancer Institute at the NIH.  She has spent the last year working as a hospitalist at St. Clair Hospital.  In her spare time, she enjoys DIY projects, gardening, and travel.

Blair Stone, MD
Dr. Blair Stone obtained her B.A in Health Policy from the University of Pittsburgh where she later returned for residency, after completing her M.D. at West Virginia University. Dr. Stone is a member of Alpha Omega Alpha (AOA), Gold Humanism Honor Society (GHHS), and Pitt Quality Improvement Committee. Dr. Stone is working with Dr. Jessica Bon studying markers of aging and COPD outcomes. In her spare time, she enjoys baking and hiking with her dog and husband. She is currently teaching herself to play guitar.

Second Year Fellows

Jason Green, DO

Dr. Jason Green graduated from Louisiana State University with a B.S. in Microbiology in 2008. He continued his education at West Virginia School of Osteopathic Medicine, graduating in 2015. Throughout his training, Jason has been an active volunteer and educator and has sought out research opportunities at all levels. While serving as Chief Resident at SUNY Downstate, he has been an active member in the Core Curriculum committee, Ultrasound and Simulation Training committee, and Wellness committee. In his spare time, he enjoys road biking, hiking, golfing and learning Brazilian Jiu-jitsu.

Matthew Gorgone, DO

Dr. Matthew Gorgone obtained his B.S in 2010 at Rochester Institute of Technology studying to be a Physician Assistant. He continued his education at Lake Erie College of Osteopathic Medicine and obtained his D.O. in 2014. He was Chief Resident at the University of Rochester and went on to complete an emergency medicine ultrasound fellowship while working as the university’s first procedural hospitalist. During this year, he served as the medical director of the bedside procedure team which he founded during his residency training, training both hospitalists and advance practice providers to ensure its sustainability. Dr. Gorgone received the Murphy Faculty Award, ACP Herbert S. Waxman Chief Resident Teaching Scholarship, and Physician Assistant Mentor of the year. Dr. Gorgone has matched for the Innovative Medical Educator Track. In his spare time, he enjoys rock climbing, running, and poker.

Innovative Medical Educator Track

Bowa Lee, MD

Dr. Bowa Lee obtained her undergraduate degree in Chemistry from Duke University in 2009. She obtained her M.D. from Wake Forest School of Medicine in 2016 and moved to Indiana University for her Internal Medicine residency. Throughout her educational career she has developed an interest in basic and translational science while balancing the rigors of medical school and clinical development in residency. Dr. Lee is fluent in English, French, and Korean, and in her spare time, she enjoys exploring new ingredients at local farmer’s markets and cooking recipes inspired from food blogs and cookbooks.

Rachel Powell, MD

Dr. Rachel Powell obtained her B.A. in Chemistry and Biology from St. Olaf College in 2011. She obtained her M.D. from Emory University School of Medicine in 2015 and completed residency at the University of Michigan. Dr. Powell has received the Kenneth Stark Research Award and graduated magna cum laude. She has spent the last year working as Attending hospitalist on general medicine and bone marrow transplant services at the University of Michigan to broaden her clinical experience while she continues to pursue scholarly activity focused on improving outcomes in critical illness syndromes including pulmonary embolism and sepsis. In her spare time, she enjoys knitting, jigsaw puzzles, and playing the piano.

Perry Tiberio, MD, PhD

Dr. Perry Tiberio received his undergraduate degree in Bioengineering from the University of Pittsburgh in 2005. He obtained his M.D. & Ph.D. at SUNY Downstate Medical Center in 2014 studying innovative vaccination methods to prevent the spread of HIV. Dr. Tiberio completed his residency at Yale in the HIV primary care track where he continued to work to contain the spread of the disease and was awarded the Ralph I. Horwitz Research in Residency Award. Since completing residency training, Perry has been working as an Attending Physician and Clinical Instructor at Columbia University caring for underserved patients in New York City and developing an interest in the consequences of drug addiction in vulnerable populations. In his spare time, he enjoys racing the Tough Mudder, graphic novels, acting, and his dog.

Georgios Triantafyllou, MD

Dr. Georgios Triantafyllou obtained his M.D. from Aristotle University of Thessaloniki Medical School graduating summa cum laude in 2012. Following medical school, Dr. Triantafyllou spent a year working as a Military Doctor in the Greek Army prior to moving to the US. Subsequently, he spent a year at Harvard Medical School studying the physiology of myokines and adipokines before relocating to Pittsburgh for his Internal Medicine residency. While at UPMC, Georgios successfully completed the “Research Education in Advancing Investigative Careers for Housestaff and Fellows Program (REACH)” and has engaged in cutting edge basic science research studying mechanisms of vascular remodeling in pulmonary hypertension. In his spare time, he enjoys basketball, traveling in foreign countries, and studying history (ancient and modern).

Richard Zou, MD

Dr. Richard Zou obtained his combined B.S. in Molecular Biology and M.D. from the University of Pittsburgh in 2012 and 2016, respectively, as part of the guaranteed admission program (GAP). During his time in medical school, he served as Class President and was elected into the Gold Humanism Honor Society. He continued his training at UPMC, where he designed a novel chest x-ray curriculum for Internal Medicine housestaff, completed a medical education certificate and published an original research manuscript examining palliative care referral patterns in patients with IPF. Dr. Zou received the AOA Resident Award and the ACP Resident Professionalism Award. In his spare time, he enjoys soccer, grilling and hiking with his significant other, an incoming Gastroenterology fellow, and their Pembroke Welsh Corgi.

Sleep Medicine Fellows

Allergy & Immunology Fellows

Taylor John Eddens, MD, PhD

UPMC Children’s Hospital of Pittsburgh – PEDIATRICS, Pittsburgh PA; Pediatric Scientist Development Program (PedSDP)
University of Pittsburgh School of Medicine, Pittsburgh PA

Sara White Van Meerbeke, MD

UPMC, Pittsburgh PA – INTERNAL MEDICINE
University of Maryland School of Medicine

Michael Sining Zhang, MD, PhD

UPMC Children’s Hospital of Pittsburgh – PEDIATRICS, Pittsburgh PA; Pediatric Scientist Development Program (PedSDP)
University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA

Graduates: June 2020

Dr. Megan Acho is completing the Sleep Fellowship at UPMC.

Dr. Kimberley DeMerle is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh. Her research focus is on sepsis endotyping using clinical and biological data.

Dr. Sarah Kiel is an Assistant Professor of Medicine at the University of Minnesota. She specializes in lung transplant and cystic fibrosis.

Dr. Brian Rosborough is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh. He has an NIH NRSA Individual Postdoctoral Fellowship (F32) and his research focuses on ARDS.

Dr. Deepti Singhvi works for a private practice in Ann Arbor, MI.  She practices both pulmonary and critical care medicine.

Dr. Daniel Sullivan is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh. He has an NIH NRSA Individual Postdoctoral Fellowship (F32) and his research focuses on the role of epithelial-derived chemokines in the pathogenesis of idiopathic pulmonary fibrosis

Dr. Jill Zupetic is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh. She has an NIH NRSA Individual Postdoctoral Fellowship (F32) and her research focuses on elastolytic activity of Pseudomonas aeruginosa.

Graduates: June 2019

Dr. Joseph Bednash is a Clinical Instructor at the Ohio State University. He is a physician scientist that studies basic mechanisms of acute lung injury.

Dr. Daniel Dunlap is an Assistant Professor of Medicine at UPMC. He completed his subspecialty fellowship training in Interventional Pulmonology at the University of Pennsylvania and has expertise in advanced bronchoscopic techniques to treat pulmonary diseases.

Dr. Matthew Camiolo is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh. He has an NIH NRSA Individual Postdoctoral Fellowship (F32) and his research focus is on the host response of asthma phenotypes.

Dr. Jennifer Newitt is a Clinical Instructor at UPMC and Post-doctoral scholar at the University of Pittsburgh.  She completed her subspecialty fellowship training in Sleep Medicine at UPMC and both her clinical and research efforts focus on the use of non-invasive ventilation in patients with neuromuscular disease.

Dr. Erin Nuzzo is a Clinical Instructor at UPMC Shadyside.  She is Director of the Medical Intensive Care Unit.

Dr. Craig Riley practices critical care at Chester County Hospital in the University of Pennsylvania Health System.  He has a specific focus on quality improvement initiatives to decrease readmission rates for COPD patients.

Dr. Eleanor Valenzi is an Assistant Professor of Medicine at UPMC. She is a physician-scientist with funding from the Scleroderma Foundation. Her research focuses on basic mechanisms of scleroderma-associated interstitial lung disease.

Graduates: June 2018

Dr. William Bain is an Assistant Professor of Medicine at UPMC. He is a physician scientist with a Veteran’s Affairs Career Development Award and studies host defense during pneumonia.

Dr. Andrea Levine is an Assistant Professor of Medicine at the University of Maryland. She is the associate program director of the Critical Care Medicine fellowship. She specializes in critical care medicine and running ICU clinical trials.

Dr. Emmet O’Brien practices respiratory medicine at Beaumont Hospital in Dublin, Ireland. He specializes in lung cancer and COPD/emphysema.

Dr. Spencer Winters practices critical care medicine at Bronson Methodist Health System in Kalamazoo, Michigan.

Dr. Stephen Strock works for a private practice in Asheville, NC.  He practices both pulmonary and critical care medicine.

Dr. Daniel Zank is an Assistant Professor of Medicine at National Jewish Health in Denver, Colorado. He specializes in taking care of patients with sarcoid and has an interest in clinical trials in the ICU.

Graduates: June 2017

Dr. Elizabeth Baker (Boulos) is an Assistant Professor of Medicine at NYU who specializes in general pulmonary and critical care medicine.

Dr. John Evankovich is an Assistant Professor of Medicine at UPMC. He has an NIH Mentored Clinical Scientist Research Award (K08) and to study basic mechanisms of acute lung injury.

Dr. Georgios Kitsios is an Assistant Professor of Medicine at UPMC. He has an NIH Mentored Patient-Oriented Research Award (K23) and studies the microbiome in ARDS. Additionally, he is the Director of the Research Pathway of the UPMC Internal Medicine residency program.

Dr. Alison Lennox is an Assistant Professor of Medicine and Pediatrics at New York Medical College. She is Director of the Adult Pulmonology Transitional Care Program and Associate Director of the Adult Cystic Fibrosis Program.

Dr. Stephanie Maximous is an Assistant Professor of Medicine at UPMC. She is a clinician educator and directs multiple educational programs including the PACCM Ventilator Course and the Internal Medicine Residency Subspecialty education for Pulmonary/CCM.

Dr. Tomeka Suber is an Assistant Professor of Medicine at UPMC. She is a physician-scientist with an NIH/Pitt Clinical and Translational Science Scholars Program award (KL2). Her research focuses on mechanisms of host defense and the role of immunometabolism in acute lung injury.

Dr. Joo Yoon is an Assistant Professor of Medicine at UPMC. He will soon begin an NIH Mentored Patient-Oriented Research Award (K23) and studies the analysis of physiologic parameters (‘features’) from bedside monitor and electronic health record to identify hidden patterns that could contribute to the development of deterioration in ICU patients.

Graduates: June 2016

Dr. Roger Alvarez is a clinical researcher at the University of Miami Health System who specializes in pulmonary vascular diseases.

Dr. Ian Barbash is an Assistant Professor of Medicine at UPMC. He has an NIH Mentored Clinical Scientist Research Award (K08) and studies how to use the medical record to evaluate sepsis policies. Additionally, he is the medical director of the TeleICU at UPMC.

Dr. Marc Gauthier is an Assistant Professor of Medicine at UPMC. He has an award from the Parker B. Francis Foundation to study immune responses that contribute to steroid-refractory severe asthma and he takes care of patients with severe asthma.

Dr. Nguyen Quyen is an Assistant Professor of Medicine at UPMC. She is a physician scientist who studies mitochondrial dysfunction in pulmonary hypertension and she takes care of patients with pulmonary hypertension.

Dr. Hannah Otepka (Mannem) is an Assistant Professor of Medicine at UVA. She specializes in lung transplant and interstitial lung disease.

Dr. Jason Rose is an Assistant Professor of Medicine at UPMC. He has an NIH Mentored Clinical Scientist Research Award (K08) and studies scavenger agents for the treatment of carbon monoxide poisoning. As a fellow and faculty at UPMC, he worked to obtain his MBA from Carnegie Mellon University and is the President and CEO of Globin Solutions, Inc.

Graduates: June 2015

Dr. Cynthia Baffi works for a private practice in San Diego, CA.  She practices both pulmonary and critical care medicine.

Dr. Seung Han is an Assistant Professor of Medicine at Northwestern University in Chicago. She has an NIH Mentored Clinical Scientist Research Award (K08) and studies metabolic regulation of lung development and repair after lung injury

Dr. Carl Koch is a Clinical Instructor at UPMC. He studies the role of the microbiome in nitric oxide metabolism as it pertains to the development of pulmonary hypertension and cardiovascular disease.

Dr. Roy Semaan is an Assistant Professor of Medicine at UPMC. He completed his subspecialty fellowship training in Interventional Pulmonology at John Hopkins University and has expertise in advanced bronchoscopic techniques to treat diseases such as lung cancer, COPD, and pleural disease.

Dr. Faraaz Shah is an Assistant Professor of Medicine at UPMC. He has an NIH Mentored Patient-Oriented Research Award (K23) and studies the metabolic effects of nutritional support during sepsis.

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