Barkun, Alan N.
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机构:
McGill Univ, McGill Univ Hlth Ctr, Montreal Gen Hosp, Div Gastroenterol, Montreal, PQ H3G 1A4, Canada
McGill Univ, McGill Univ Hlth Ctr, Montreal Gen Hosp, Div Clin Epidemiol, Montreal, PQ, Canada King Saud Univ, King Khalid Univ Hosp, Div Gastroenterol, Riyadh, Saudi Arabia