Ickovics, Jeannette R., Trace S. Kershaw, Claire Westdahl, Urania Magriples, Zohar Massey, Heather Reynolds, and Sharon Schindler Rising. "Group prenatal care and perinatal outcomes: a randomized controlled trial." Obstetrics and gynecology 110, no. 2 Pt 1 (2007): 330-9.