Garland Cedric F, Garland Frank C
Department of Epidemiology, The Johns Hopkins University, School of Hygiene and Public Health, 615 N Wolfe Street, Baltimore, MD 21205, USA.
Int J Epidemiol. 2006 Apr;35(2):217-20. doi: 10.1093/ije/dyi229. Epub 2005 Nov 22.