RT Journal Article SR Electronic T1 Oxycodone administered as postpartum pain relief is associated with maternal report of infant central nervous system depression in breastfed infants JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 40 OP 41 DO 10.1136/ebmed-2012-100777 VO 18 IS 1 A1 Wibke Christina Jonas YR 2013 UL http://ebm.bmj.com/content/18/1/40.abstract AB