00483nas a2200169   4500000000100000000000100001008004100002100001600043700001600059700001400075700001300089700001600102245016400118300001100282490000600293022001400299       2000                            d1 aT. van Staa1 aL. Abenhaim1 aC. Cooper1 aB. Zhang1 aH. Leufkens00aThe use of a large pharmacoepidemiological database to study exposure to oral corticosteroids and risk of fractures: validation of study population and results  a359-660 v9  a1053-8569