RT Journal Article SR Electronic T1 Etidronate, calcium, or both did not reduce fracture rates in patients with asthma receiving glucocorticoid treatment JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 53 OP 53 DO 10.1136/ebm.10.2.53 VO 10 IS 2 YR 2005 UL http://ebm.bmj.com/content/10/2/53.abstract AB