RT Journal Article SR Electronic T1 Continuing alendronate for an additional 5 years maintained bone mineral density in postmenopausal women JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 70 OP 70 DO 10.1136/ebm.12.3.70 VO 12 IS 3 YR 2007 UL http://ebm.bmj.com/content/12/3/70.abstract AB