title: General practice trials: the importance of creating evidence.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Nelson
mesh_terms: D005260:Female; D058006:General Practice; D006801:Humans; D008019:Life Style; D008297:Male; D010348:Patient Care Team; D029424:Pulmonary Disease, Chronic Obstructive / Q000628:therapy*; D012308:Risk Management; D014652:Vascular Diseases / Q000517:prevention & control*