title: Francis H. Williams and William H. Rollins.
authors.affiliation: Potomac, MD 20854, USA.
authors.forename: Otha
authors.initials: O
authors.lastname: Linton
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D008404:Massachusetts; D010820:Physicians / Q000266:history*; D011859:Radiography / Q000266:history*; D011871:Radiology / Q000266:history*