Colorectal surgery.
Rutkow
I M
IM
D002568:Certification / Q000266:history; D003107:Colorectal Surgery / Q000266:history*; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D013044:Specialty Boards / Q000266:history*; D014481:United States