Wyrick P B, Davis C H, Knight S T, Choong J, Raulston J E, Schramm N
Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill 27599.
Sex Transm Dis. 1993 Sep-Oct;20(5):248-56. doi: 10.1097/00007435-199309000-00002.