title: Understanding research: 1. Methodologies used to answer research questions.
authors.affiliation: Guy's and St Thomas' NHS Trust, London.
authors.forename: H
authors.initials: H
authors.lastname: Baxter
mesh_terms: D015982:Bias; D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D003625:Data Collection / Q000379:methods / Q000592:standards; D003627:Data Interpretation, Statistical; D019317:Evidence-Based Medicine / Q000379:methods / Q000592:standards; D006801:Humans; D036301:Qualitative Research; D016032:Randomized Controlled Trials as Topic / Q000592:standards; D015203:Reproducibility of Results; D012106:Research / Q000592:standards; D012107:Research Design / Q000592:standards