How to read a paper. Getting your bearings (deciding what the paper is about).
Greenhalgh
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Department of Primary Care and Population Sciences, University College London Medical School/Royal Free Hospital School of Medicine, Whittington Hospital, London. p.greenhalgh@ucl.ac.uk
D016022:Case-Control Studies; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D017594:Publication Bias; D016032:Randomized Controlled Trials as Topic; D012107:Research Design