Rectal dilators.
Kravetz
R
R
American College of Gastroenterology, USA.
D004106:Dilatation / Q000266:history* / Q000295:instrumentation; D004867:Equipment Design / Q000266:history; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D012002:Rectal Diseases / Q000266:history* / Q000628:therapy