Roberto Romero1. 1. Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development/National Institutes of Health/Department of Health and Human Services. Electronic address: rr.ajoged@gmail.com.
Authors: H Chang; J C Hobbins; G Cividalli; F D Frigoletto; M J Mahoney; Y W Kan; D G Nathan Journal: N Engl J Med Date: 1974-05-09 Impact factor: 91.245