RT Journal Article SR Electronic T1 Modest cancer prevention benefit with long-term multivitamin supplementation: Physicians’ Health Study II results warrant cautious interpretation JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 214 OP 215 DO 10.1136/eb-2012-101188 VO 18 IS 6 A1 Wendy Demark-Wahnefried YR 2013 UL http://ebm.bmj.com/content/18/6/214.abstract AB