G R Alexander1, E Howell. 1. Department of Maternal and Child Health, School of Public Health, University of Alabama, Birmingham 35294-2010, USA. alexandg@mjh.soph.uab.edu
Authors: Maureen I Heaman; Christine V Newburn-Cook; Chris G Green; Lawrence J Elliott; Michael E Helewa Journal: BMC Pregnancy Childbirth Date: 2008-05-01 Impact factor: 3.007