title: Squamous cell carcinoma in situ: a historical note.
authors.affiliation: charlessteffen@cox.net
authors.forename: Charles
authors.initials: C
authors.lastname: Steffen
mesh_terms: D002278:Carcinoma in Situ / Q000266:history*; D002294:Carcinoma, Squamous Cell / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century