Current Trainees

First Year Fellows

Melanie Babinski received her MD and completed her Pediatric residency at McGill University in Montreal, Canada. She has pursued clinical research on type 1 diabetes in Haiti. In Melanie’s free time, you can find her running marathons or playing the piano at the Royal Conservatory. She is a true “foodie” and loves to explore new restaurants and try new recipes.

Sara Mazzantini was born and raised in Milan, Italy, and earned her MD from the University of Milan Medical School. After completing her pediatrics residency at Vittore Buzzi Children’s Hospital, Sara practiced as general pediatrician for two years at the San Gerardo Hospital in Monza, Italy, where she also provided comprehensive care for patients with metabolic disorders. She is interested in all aspects of pediatric endocrinology, particularly issues of growth and nutritional disorders. In her free time, Sara enjoys traveling and managing a bustling household of five (which some say is the best Italian restaurant in town), all while trying to keep up with her Peloton.

Nessa Tantivit received her MD from Sriraj Hospital Faculty of Medicine in Thailand. She practiced as a general physician for 3 years in Thailand before pursuing a pediatric residency at the University of South Alabama, where she conducted research on childhood obesity. In Nessa’s free time, she loves to run and play basketball. She has been to 11 of the 12 Disney parks around the world and is planning to complete her list soon!

Arti Uniyal received her MBBS from Maulana Azad Medical College in India. She completed her pediatric residency at the University College of Medical Sciences and Chief Residency in Pediatrics at the Baba Saheb Ambedkar Hospital in Delhi, India. Her research has focused on dyslipidemia in children. Arti loves reading and music, including playing the sitar and listening to Bollywood and Korean pop. She also loves traveling and trying diverse cuisines and has visited more than twenty countries.

Second Year Fellows

Dwight McCoy Chambers is from Nashville, TN.  He received his undergraduate and master’s degrees in Nuclear Science and Engineering from MIT before pursuing a MD/PhD from Emory University and the Georgia Institute of Technology.  His thesis focused on mechanotransduction and genetic approaches to treating pulmonary fibrosis.  He completed his pediatric residency in the Boston Combined Residency Program before joining the Endocrinology Division for fellowship training. Dwight enjoys alliteration and spending time with the five B’s of life – baking, bowties, board games, brother (Davis), and Brian (husband).  

Zina McSweeney attended Campbell University School of Osteopathic Medicine in North Carolina and completed her pediatric residency training at Joe DiMaggio Children’s Hospital in Florida. Her research has included evaluating outcomes among patients in a pediatric weight management clinic. During her residency, she participated in advocacy for improved access to mental health resources for teens. She is interested in all aspects of pediatric endocrinology, especially management of diabetes, polycystic ovary syndrome, and metabolic syndrome. In her free time, she loves to jog on nature trails, garden, and spend time with her family.

Third Year Fellows

Ray Kreienkamp was born and raised in St. Louis, Missouri. He attended Saint Louis University School of Medicine, where he earned his MD and PhD. His doctoral research in Biochemistry and Molecular Biology focused on the molecular mechanisms of Hutchinson-Gilford Progeria Syndrome. After medical school, he completed Pediatrics residency at St. Louis Children’s Hospital and Washington University School of Medicine. His academic interests include the genetics of endocrine disorders, particularly diabetes. Out of the hospital, you will usually find him somewhere around a pool, watching, playing, or coaching his favorite sport, water polo. 

Jessica Ruiz is originally from Austin, Texas. She received her BS in Bioengineering from Rice University and her MD from Harvard Medical School in the Harvard-MIT Health Sciences and Technology (HST) program. She completed her residency in Pediatrics in the Boston Combined Residency Program. Her research interests include expanding the use of continuous glucose monitoring (CGM) by combining novel clinical and computational approaches. In her free time, she loves to cook, bake and practice Latin dancing.

Sarah Schlegel was born in Newton, Massachusetts, and she received her MD and MS in Biology at Stanford University School of Medicine. She completed Pediatrics residency in the Boston Combined Residency Program, where she pursued research on provider communication with patients and families about leukemia treatments and outcomes. During graduate and medical school, she participated in clinical and basic research in genetics, and she remains interested in studying the genetics of endocrine disorders. She has worked as a writer and as a mental health peer counselor, and she loves to sing, dance, read novels, attend (and participate in) theater productions, join creative writing workshops, and go on hiking and kayaking trips.