[Changes of direction in gastroenterology].
Riemann
J F
JF
Medizinische Klinik C, Klinikum Ludwigshafen.
D000818:Animals; D005762:Gastroenterology / Q000266:history* / Q000639:trends; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D010506:Periodicals as Topic / Q000266:history