[Quality assurance in operative medicine--a part of the clinical research].
Gastinger
I
I
D015179:Colorectal Neoplasms / Q000601:surgery; D005858:Germany; D006801:Humans; D011057:Politics; D011785:Quality Assurance, Health Care / Q000592:standards*; D012922:Social Change; D012955:Societies, Medical; D013514:Surgical Procedures, Operative / Q000592:standards*