pubmed:affiliation |
Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, 615 N. Wolfe St., Rm. E 6138, Baltimore, MD 21205, USA.
|
pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
|