TY  - RPRT
TI  - Gastrointestinal problems in the old. I.
AU  - D E Hyams
PY  - 1974
DO  - 10.1136/bmj.1.5898.107
UR  - https://pubmed.ncbi.nlm.nih.gov/4520577/
ID  - 4520577
ER  -