TY  - RPRT
TI  - Assisting at gastroscopy.
AU  - Gabriele Schindler
AU  - Rudolf Schindler
PY  - 2003
DO  - 10.1067/mge.2003.100
UR  - https://pubmed.ncbi.nlm.nih.gov/12612521/
ID  - 12612521
ER  -