Daniel K. Guillen, MD

Daniel
K.
Guillen
MD
Associate Professor
Child Neurology

Daniel Guillen, MD, is Assistant Professor of Pediatrics and Neurology at Vanderbilt University Medical Center, where he serves as Director of the Pediatric Neuromuscular Program and Co-Director of the Duchenne Muscular Dystrophy Clinic. Dr. Guillen received his medical degree from Universidad Peruana Cayetano Heredia and completed his residency in Child Neurology at the University of Pittsburgh Medical Center (UPMC). He subsequently completed a fellowship in Neuromuscular Medicine at Duke University. Prior to joining Vanderbilt, Dr. Guillen was a pediatric neuromuscular neurologist at Le Bonheur Children’s Hospital, where he served as Co-Director of the MDA Clinic. He was also actively involved in clinical research at St. Jude Children’s Research Hospital. Dr. Guillen’s clinical and academic work centers on pediatric neuromuscular disorders, including muscular dystrophies and rare neuromuscular diseases. He is engaged in multicenter clinical trials and investigator-initiated research focused on gene therapy and emerging therapeutics in neuromuscular disease. His research has been supported by a St. Jude/Le Bonheur Early-Career Clinician Scientist Award.

daniel.guillen@vumc.org

Brandi Williams, DO

Brandi
Williams
DO
1st Year Fellow

Residency: Case Western Reserve University
Medical School: Alabama College of Osteopathic Medicine 

Devan Wilkins, MD

Devan
Wilkins
MD
1st Year Fellow

Devan was born and raised in Shelburne, Vermont. She attended Northeastern University in Boston, where she earned her Bachelor of Science degree in Chemistry. She attended EVMS for medical school prior to completing her pediatric residency at Vanderbilt. Devan's professional interests include perinatal counseling, BPD physiology and ECMO.

Outside of the hospital, Devan enjoys spending time with her husband, daughter and dog. She has a love-hate relationship with running but can always be convinced to sign up for a half-marathon. She enjoys hiking, going to breweries and watching Formula 1.

Residency: Vanderbilt University Medical Center
Medical School: Eastern Virginia Medical School 

Soumya Jena, MB, BS

Soumya
Jena
MB, BS
1st Year Fellow

Residency: ETSU/Quillen College of Medicine
Medical School: Grant Government Medical College

Min Gong, MD, PhD

Min
Gong
MD, PhD
1st Year Fellow

Min was born and raised in China. He earned both his MD (2007) and PhD (2012) from Chongqing Medical University. His doctoral research focused on the use of stem cells to repair hypoxic-ischemic brain injury. From 2012 to 2017, he completed postdoctoral training in the Department of Pathology at the University of Cincinnati, where he investigated regenerative therapies using stem cell-derived exosomes for myocardial infarction and therapeutic angiogenesis. After completing his postdoctoral training, he returned to China and worked as a neonatologist in the Department of Neonatology at the Children's Hospital of Soochow University. In 2022, he moved back to the United States and completed his pediatric residency training in New York.

Min has a strong passion for both scientific research and road trips. Together with his wife, he has traveled to 43 U.S. states by car. Outside of work, he enjoys spending time with his wife and their toddler son exploring the Nashville area. Once their little one is old enough to enjoy long journeys, they look forward to hitting the road again and embarking on a new series of family road trips.

Residency: Richmond University Medical Center 
Medical School: Chongqing Medical University

Dorianna Dobson, MD

Dorianna
Dobson
MD
1st Year Fellow

Dorianna was born and raised in Georgia before completing her undergraduate education at Georgia College & State University, where she earned a Bachelor of Science degree in Biology. She went on to attend Mercer University School of Medicine before moving to Nashville to complete her pediatric residency at Vanderbilt. Dorianna’s professional interests include neonatal physiology, respiratory support of premature infants, medical education and clinical research, with a particular interest in the neonatal microbiome.

Outside of the hospital, she enjoys spending time with her husband, JC, their golden retriever, Draper and calico, Lara. She also enjoys exploring Nashville’s coffee shops and restaurants, staying active and spending quality time with friends and family.

Residency: Vanderbilt University Medical Center
Medical School: Mercer University School of Medicine 

Rachael-Catherine Wilson, APRN, CPNP-PC

Rachael-Catherine
Wilson
APRN, CPNP-PC
Nurse Practitioner
Pediatric Neurology
rc.wilson@vumc.org

I earned my undergraduate degree in Biology from the University of Mississippi (Ole Miss) before completing both my nursing and Nurse Practitioner education at Vanderbilt University School of Nursing, where I specialized in pediatrics. I practiced in pediatric primary care for nearly five years, providing compassionate, evidence-based care and partnering with families to support children's health and development. I am passionate about helping children thrive and creating a positive, supportive experience for every patient and family. Outside of the clinic, I enjoy spending time with my husband, our baby girl and our two golden retrievers.

Lilianna (Lily) Suarez, MD, MPH

Lilianna
(Lily)
Suarez
MD, MPH
Fellow
Academic General Pediatrics

Lilianna (Lily) Suarez, MD, MPH, is a Research Fellow in the Division of General Pediatrics at Vanderbilt University Medical Center, where she joined the fellowship in 2026. She is a physician-scientist with a passion for improving child health through innovative, family-centered approaches to obesity treatment and chronic disease prevention. Her research focuses on pediatric weight management, medical weight-loss interventions, clinical trials, implementation science, and the ways social and environmental factors influence health outcomes for children and families. Dr. Suarez earned her bachelor of science degree in biomedical science with a minor in global public health from The Ohio State University. She subsequently completed her master of public health degree at the University of North Carolina at Chapel Hill and doctor of medicine at Duke University before completing combined internal medicine-pediatrics residency at Duke University. A central theme in Dr. Suarez's scholarship is the importance of caregivers and families in supporting healthy behaviors and sustainable lifestyle change. By combining rigorous clinical research with implementation science, she seeks to develop interventions that are not only effective, but also practical and scalable across health care settings.

Larry Markham, MD, MSCR

Larry
Markham
MD, MSCR
Director
Division of Pediatric Cardiology
Co-director, Pediatric Heart Institute
Monroe Carell Jr. Children's Hospital at Vanderbilt
larry.w.markham@vumc.org