Risk and Protective Factors for Preterm Birth Among Racial, Ethnic, and Socioeconomic Groups in California.

Jelliffe-Pawlowski LL, Baer RJ, Oltman S, McKenzie-Sampson S, Afulani P, Amsalu R, Bell AJ, Blebu B, Blackman KCA, Chambers CD, Costello J, Fuchs J, Garay O, Karvonen KL, Kuppermann M, Lyndon A, McCulloch CE, Ong G, Ponting C, Rand L, Rogers EE, Ryckman KK, Spellen S, Subramaniam A, Swander L, Taylor KD, Williams S, Tabb KM