Current Trainees

First 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).  

Magdalena Ivanova was born in Bulgaria and raised in Chicago, IL. She earned her BA in Biology from the University of Chicago and her MD from Harvard Medical School. She completed her pediatrics residency in the Boston Combined Residency Program. Her research interests include health disparities and quality improvement. In her free time, she enjoys hiking, biking, trying new recipes, and playing with her cat, Zara. 

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.

Second 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.

Third Year Fellows

Chang Lu was born in China. She earned her MD from Case Western Reserve University School of Medicine. She completed residency in Pediatrics at Children’s Hospital at Montefiore, and worked as a primary care pediatrician in Ohio before beginning fellowship in Pediatric Endocrinology. She is interested in all aspects of endocrinology, particularly diabetes management. When Chang isn’t on call you can find her focusing on her animation art, painting or cultural dancing.

Ambreen Sonwalla headshot

Ambreen Sonawalla was born in Karachi, Pakistan and earned her MD and MS from Aga Khan University Medical School. Her love of endocrinology began in medical school and continued through her Pediatrics residency at the University of Arkansas for Medical Sciences. Ambreen is committed to volunteer activities at diabetes camp and community health camps. In her free time, she practices yoga and calligraphy, and enjoys listening to her favorite podcasts.

Rebecca Vitale Headshot

Rebecca Vitale was born and raised in Louisville, Kentucky. She received her MD and MPH from the Yale School of Medicine. She completed her Medicine-Pediatrics combined residency at Yale New Haven Hospital, where she served as chief resident. Her research in residency focused on gender disparities in the Adult Congenital Heart Disease Clinic and on the transition from pediatric to adult care. In her free time, Becca is happiest outdoors hiking or running. She also loves to cook, bake, and knit.

Fourth Year Fellows

Kristie Aamodt Headshot

Kristie Aamodt was born in Houston, Texas and earned her MD and PhD from the Vanderbilt University School of Medicine. She is a graduate of the Boston Combined Residency Program in Pediatrics, which she completed on the Accelerated Research Pathway. She is dedicated to caring for each individual patient at their bedside, and to using basic research to improve care for all patients. Her basic research experience has focused primarily on proliferation and regeneration of pancreatic beta cells. If you can’t find Kristie on call or in the lab, she is probably training for a triathlon, cycling, or playing the flute.