Recruitment and retention of women in a large randomized control trial to reduce repeat preterm births: the Philadelphia Collaborative Preterm Prevention Project

by Bennett Ian M, Mathew Leny, Bloch Joan R, Elo Irma T, Hogan Vijaya K, Goldenberg Robert L, Coyne James C, Webb David A, Dennis Erika F, Culhane Jennifer F
Published 2010-09-01