TY  - RPRT
TI  - Modification of examination couch for sigmoidoscopy.
AU  - G Nicholson
AU  - A D Barr
PY  - 1979
DO  - 10.1016/s0140-6736(79)92231-1
UR  - https://pubmed.ncbi.nlm.nih.gov/87730/
ID  - 87730
ER  -