RT Journal Article SR Electronic T1 Premature Birth and Subsequent Admission to Hospital JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 80 OP 82 DO 10.1136/jech.14.2.80 VO 14 IS 2 A1 S. T. Winter A1 W. Mainzer YR 1960 UL http://jech.bmj.com/content/14/2/80.abstract AB