title: Blue, red and green research.
authors.affiliation: London School of Hygiene and Tropical Medicine, England.
authors.forename: S B
authors.initials: SB
authors.lastname: Rifkin
mesh_terms: D003906:Developing Countries; D006302:Health Services Research / Q000379:methods* / Q000592:standards; D006801:Humans; D011320:Primary Health Care; D011634:Public Health; D012107:Research Design / Q000592:standards*