is professor of surgery, pediatrics, obstetrics and gynecology at The Warren Alpert Medical School of Brown University and is a member of the Division of Pediatric Surgery at Hasbro Children's Hospital and Women & Infants Hospital. He is also the co-director (with Dr. Stephen Carr) of the Fetal Treatment Program.
He has authored or co-authored over 120 peer-reviewed publications and book chapters, and more than 100 abstracts.
His research interests include fetal development and fetal surgery, and in particular the etiology of Twin-to-Twin Transfusion Syndrome. He was the site principal investigator for the first randomized study on endoscopic fetal surgery for this syndrome; the Brown Fetal Treatment Program was the only North American center participating in the study. The Program is a founding member of the North American Fetal Treatment Network (NAFTNet).