Twinning and Neurologic Morbisity
Am J Dis Child 146:1110-1113, Scheller,J.M.&Nelson,K.B., 1992
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Pediatrics 92:854-858, Grether,J.K.,et al, 1993
Prenatal Origin of Hemiparetic Cerebral Palsy:How Often and Why?
Pediatrics 88:1059-1062, Nelson,K.B., 1991