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Cummings KM, Kelly J, Sciandra R, Deloughry T, Francois F.Cummings KM, et al.Am J Health Promot. 1990 Jul;4(6):429-34. doi: 10.4278/0890-1171-4.6.429.Am J Health Promot. 1990.PMID: 22204621
Hyland A, Li Q, Bauer JE, Giovino GA, Bauer U, Cummings KM.Hyland A, et al. Among authors: cummings km.Am J Health Promot. 2006 Mar-Apr;20(4):272-81. doi: 10.4278/0890-1171-20.4.272.Am J Health Promot. 2006.PMID: 16555801