Shrank, William H.; Patrick, Amanda; Gleason, Patrick P.; Canning, Claire; Walters, Carol; Heaton, Alan H.; Jan, Saira; Brookhart, M Alan; Schneeweiss, Sebastian; Solomon, Daniel H.; Wolf, Michael S.; Avorn, Jerry; Choudhry, Niteesh K.
Medical Care. 47(9):1031-1035, September 2009.
doi: 10.1097/MLR.0b013e3181a81181