Rogstad K E, Davies A, Murthy S K, Searle S, Mee R A
Department of Genitourinary Medicine, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, and Chesterfield and North Derbyshire Royal Hospital, UK.
Sex Transm Infect. 2000 Dec;76(6):493-4. doi: 10.1136/sti.76.6.493.