Belitser, S.V.

patient study children treatment covariate therapy group medication method score asthma scale regression model pattern number buccal treatment effect effect asthma medication use table purity nurse sample strati fication dna purity birthday ps methods monotherapy netherland multivariable 2010 john wiley researcher drug safety propensity medication use strati fication 2007 john wiley observation level propensity score balance treatment groups collection medication use patterns buccal cell samples ps model result pain scale symptom ratio utrecht ics monotherapy analysis sedation wiley history difference saba monotherapy pharmacoepidemiology prescription correlation copyright rating scale treatment effects measurement signi hazard nrs nurse fi rst fluence determinant 10.1002/ safety figure adjustment hazard ratio pharmacy citation purposes