... contributed topreparation of the paper. MIR, AA, and JP contributed to the design of the study, the analysis of the data, and preparationof the paper. All authors read and approved the finalmanuscript.AcknowledgementsEMM ... addition, the use of the propensityscore provided a way to control for these differences in the analysis by defining patients comparable to those with the same score.ConclusionThis study demonstrates ... consultantwith Pfizer, Ortho-McNeil, and Bayer Pharma.Authors' contributionsEMM originated and coordinated the study, obtained funding,contributed to the analysis of the data, and contributed...