TY  - GEN
AU  - Classen,M
TI  - [Unnecessary endoscopy and biopsy]
SN  - 0172-8504
PY  - 1984///0725
KW  - Biopsy
KW  - Gastrointestinal Diseases
KW  - pathology
KW  - Gastroscopy
KW  - Germany, West
KW  - Humans
KW  - Surveys and Questionnaires
N1  - Publication Type: Journal Article
ER  -