RT Journal Article SR Electronic T1 Nuchal Cord JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 296 OP 296 DO 10.3122/jabfm.1.4.296b VO 1 IS 4 A1 Yawn, Barbara P. YR 1988 UL http://www.jabfm.org/content/1/4/296.3.abstract AB