TY  - RPRT
TI  - Study design issues in irritable bowel syndrome.
AU  - A W Mangel
PY  - 2004
DO  - 10.1046/j.1365-2036.2003.01816.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14687176/
ID  - 14687176
ER  -