TY  - RPRT
TI  - Reflections by an endoscopist.
AU  - Guido N J Tytgat
PY  - 2003
DO  - 10.1016/s0016-5107(03)02160-6
UR  - https://pubmed.ncbi.nlm.nih.gov/14652543/
ID  - 14652543
ER  -