Brewer, D. D., Potterat, J. J., Roberts, J. M., Jr., & Brody, S. (2009). Unhygienic male circumcision procedures and HIV infection. South African Medical Journal, 99, 11.
Note: The third sentence of the second paragraph contains an author error. This sentence should read: "In each country, circumcised virgins were substantially more likely to be HIV infected than uncircumcised virgins."