RT Journal Article SR Electronic T1 Calcium did not prevent fractures in elderly women JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 149 OP 149 DO 10.1136/ebm.11.5.149 VO 11 IS 5 YR 2006 UL http://ebm.bmj.com/content/11/5/149.abstract AB