California Very Preterm Birth Study: design and characteristics of the population- and biospecimen bank-based nested case–control study (pages 250–263)Martin Kharrazi, Michelle Pearl, Juan Yang, Gerald N. DeLorenze, Christopher J. Bean, William M. Callaghan, Althea Grant, Eve Lackritz, Roberto Romero, Glen A. Satten, Hyagriv Simhan, Anthony R. Torres, Jonna B. Westover, Robert Yolken and Dhelia M. Williamson
Article first published online: 31 JAN 2012 | DOI: 10.1111/j.1365-3016.2011.01252.x