TY  - GEN
AU  - Klassen,M
TI  - [Value of endoscopic studies in prevention and early diagnosis of malignant gastrointestinal tumors]
SN  - 0869-6047
PY  - 1998///0722
KW  - Adult
KW  - Diagnosis, Differential
KW  - Endoscopy, Gastrointestinal
KW  - Follow-Up Studies
KW  - Gastrointestinal Neoplasms
KW  - diagnosis
KW  - Humans
KW  - Middle Aged
KW  - Neoplasm Recurrence, Local
KW  - Sensitivity and Specificity
N1  - Publication Type: Journal Article
ER  -