TY  - RPRT
TI  - Gastroscopy.
AU  - J A Gregg
AU  - M Garabedian
PY  - 1971
DO  - 10.1016/s0039-6109(16)39439-7
UR  - https://pubmed.ncbi.nlm.nih.gov/5314205/
ID  - 5314205
ER  -