机构:
Med Univ S Carolina, Dept Med, Div Gastroenterol & Hepatol, Charleston, SC 29425 USAMed Univ S Carolina, Dept Med, Div Gastroenterol & Hepatol, Charleston, SC 29425 USA
机构:
Univ Oslo, Dept Gen Practice & Community Med, Sect Med Eth, N-0318 Oslo, NorwayUniv Oslo, Dept Gen Practice & Community Med, Sect Med Eth, N-0318 Oslo, Norway