TY  - RPRT
TI  - Hyperplastic polyp causing ball-valve effect.
AU  - Y Sone
AU  - T Honda
AU  - S Nakano
PY  - 2000
DO  - 10.1016/s0016-5107(00)70162-3
UR  - https://pubmed.ncbi.nlm.nih.gov/10650265/
ID  - 10650265
ER  -