00436nas a2200157   4500000000100000000000100001008004100002100001600043700001600059700001300075700001400088245014300102300001300245490000600258022001400264       2009                            d1 aT. van Staa1 aH. Leufkens1 aB. Zhang1 aL. Smeeth00aA comparison of cost effectiveness using data from randomized trials or actual clinical practice: selective cox-2 inhibitors as an example  ae10001940 v6  a1549-1277