TY  - RPRT
TI  - Primary constipation: an underlying mechanism.
AU  - B A Sikirov
PY  - 1989
DO  - 10.1016/0306-9877(89)90016-9
UR  - https://pubmed.ncbi.nlm.nih.gov/2927355/
ID  - 2927355
ER  -