Male circumcision linked to lower rates of cervical cancer

An editing slip occurred in this news article by Fred Charatan (27 April, p 994), in which we said that researchers tested for the presence of penile human papillomavirus DNA in 1520 men in the study, and found it in 1139 (75%). It should have said that the researchers got a valid result in that number of subjects. The virus was not found in that number.