TY  - RPRT
TI  - External sphincterotomy at the 12 o'clock position.
AU  - H M Carrion
AU  - B T Brown
AU  - V A Politano
PY  - 1979
DO  - 10.1016/s0022-5347(17)56826-3
UR  - https://pubmed.ncbi.nlm.nih.gov/439219/
ID  - 439219
ER  -