title: Lessons from longitudinal studies.
authors.forename: C H
authors.initials: CH
authors.lastname: Patrick
mesh_terms: D000368:Aged; D003430:Cross-Sectional Studies; D003625:Data Collection; D003627:Data Interpretation, Statistical; D006291:Health Policy / Q000639:trends; D006801:Humans; D008137:Longitudinal Studies; D014481:United States