It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Magill, Alan J. MD, MACP, FIDSA, FASTMH, HIll, David R. MD, DTM & H, FRCP, FFTM (RCPS Glasg), FASTMH, Solomon, Tom BA, FRCP, DCH, DTMH, PhD, & Ryan, Edward T MD, FACP, FIDSA, FASTMH. (2012). Gastrointestinal diseases. Hunter's tropical medicine and emerging infectious diseases, ninth edition (9th ed., pp. 18) Elsevier Inc.