RT Journal Article SR Electronic T1 Cobedding Twins and Higher-Order Multiples in a Hospital Setting JF Pediatrics JO Pediatrics FD American Academy of Pediatrics SP 1359 OP 1366 DO 10.1542/peds.2006-3096 VO 120 IS 6 A1 Tomashek, Kay Marie A1 Wallman, Carol YR 2007 UL http://pediatrics.aappublications.org/content/120/6/1359.abstract AB