Nilsen, Arvid, et al. “Herpes Simplex Virus Infection and Genital Ulcer Disease Among Patients With Sexually Transmitted Infections in Dar Es Salaam, Tanzania”. Acta Dermato-Venereologica, vol. 87, no. 4, May 2007, pp. 355-9, doi:10.2340/00015555-0241.