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Contraceptive method switching in the United States.
Grady WR, Billy JO, Klepinger DH. Grady WR, et al. Among authors: billy jo. Perspect Sex Reprod Health. 2002 May-Jun;34(3):135-45. Perspect Sex Reprod Health. 2002. PMID: 12137127
Condom use among U.S. men, 1991.
Tanfer K, Grady WR, Klepinger DH, Billy JO. Tanfer K, et al. Among authors: billy jo. Fam Plann Perspect. 1993 Mar-Apr;25(2):61-6. Fam Plann Perspect. 1993. PMID: 8491288
20 results