title: Investigation of selection bias using inverse probability weighting.
authors.forename: Kazim
authors.initials: K
authors.lastname: Sheikh
mesh_terms: D015331:Cohort Studies; D005500:Follow-Up Studies; D006801:Humans; D011336:Probability; D012107:Research Design / Q000706:statistics & numerical data*; D015983:Selection Bias; D013030:Spain