Donald R. Coustan，美国布朗大学医学院教授，国际知名妊娠糖尿病专家。Dr. Coustan is a past president of the Society for Maternal-Fetal Medicine, past chairman of the American Diabetes Association, and has held numerous other national positions. He is board certified in obstetrics and gynecology and maternal-fetal medicine.Dr. Coustan is an internationally recognized expert on the management of diabetes in pregnancy, and is the author of more than 200 research papers and scholarly publications, many of which deal with diabetes.