Friday, August 29, 2008 - 3:51PM EST

United States

Maryland

Name of AuthorInstitutional Affiliation
Creanga AADepartment of Population, Family and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA. acreanga@jhsph.edu
Witkop CTDepartment of Population, Family and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.