Recruitment, retention, and compliance results from a probability study of children's environmental health in economically disadvantaged neighborhoods.
Sexton K, Adgate JL, Church TR, Greaves IA, Ramachandran G, Fredrickson AL, Geisser MS, Ryan AD. Recruitment, retention, and compliance results from a probability study of children's environmental health in economically disadvantaged neighborhoods. Environ Health Perspect. 2003 May; 111(5):731-6.