title: Study design, precision, and validity in observational studies.
authors.affiliation: National Palliative Care Research Center, New York, New York, USA. melissa.carlson@mssm.edu
authors.forename: Melissa D A
authors.initials: MD
authors.lastname: Carlson
authors.forename: R Sean
authors.initials: RS
authors.lastname: Morrison
mesh_terms: D015331:Cohort Studies; D003430:Cross-Sectional Studies; D006801:Humans; D019370:Observation; D010166:Palliative Care; D012107:Research Design; D054928:Validation Studies as Topic