International comparative study of the prevalence and impact of gastrointestinal symptoms: an introduction.
Stanghellini
V
V
University of Bologna, Italy.
D003430:Cross-Sectional Studies; D003625:Data Collection; D005260:Female; D005767:Gastrointestinal Diseases / Q000191:economics* / Q000453:epidemiology*; D014943:Global Health; D006801:Humans; D007391:International Cooperation; D008297:Male