The Probability of Neonatal Respiratory Distress Syndrome as a Function of Gestational Age and Lecithin/Sphingomyelin Ratio - St. Clair, Caryn; Norwitz, Errol R; Woensdregt, Karlijn; Cackovic, Michael; Shaw, Julia A; Malkus, Herbert; Ehrenkranz, Richard A; Illuzzi, Jessica L (American Journal of Perinatology, 2008)