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Central challenges facing the national clinical research enterprise.
JAMA: the Journal of the American Medical Association [0098-7484] Sung, Nancy yr:2003 vol:289 iss:10 pg:1278 -1287
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Sung, Nancy S
Crowley, William F
Sherwood, Louis M
Johnson, Stephen B
Larson, Elaine L
Reece, E A
Martinez, Rick A
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