Chiu, Hsien-Yi, et al. “Concurrent Cytomegalovirus and Herpes Simplex Virus Infection in Pemphigus Vulgaris Treated With Rituximab and Prednisolone”. Acta Dermato-Venereologica, vol. 93, no. 2, Aug. 2012, pp. 200-1, doi:10.2340/00015555-1429.