Tam, CC; Rodrigues, LC; O'Brien, SJ; (2003) The study of infectious intestinal disease in England: what risk factors for presentation to general practice tell us about potential for selection bias in case-control studies of reported cases of diarrhoea. International journal of epidemiology, 32 (1). pp. 99-105. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyg007 Full text not available from this repository.