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The American Journal of Clinical Nutrition|January 1, 1997
Brief description of the Multiple Risk Factor Intervention TrialM O Kjelsberg, J A Cutler, T A Dolecek
Controlled Clinical Trials|April 1, 1993
Recruitment of participants in the Lung Health Study, I: Description of methodsD A Durkin, M O Kjelsberg, A S Buist, et al.
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