TY  - RPRT
TI  - Endoscopy under gnotobiotic conditions: a unique experience.
AU  - D Y Graham
AU  - W J Klish
AU  - G D Ferry
AU  - B B Holcome
PY  - 1978
DO  - 10.1016/s0016-5107(78)73551-0
UR  - https://pubmed.ncbi.nlm.nih.gov/730010/
ID  - 730010
ER  -