[1] Linkoping Univ Hosp, Dept Mol & Crit Med, Div Gastroenterol & Hepatol, S-58185 Linkoping, Sweden
[2] Univ Hosp Orebro, Dept Pathol, Clin Res Ctr, Orebro, Sweden
[3] Cty Hosp, Dept Internal Med, Oskarshamn, Sweden
[4] Linkoping Univ Hosp, Dept Hlth Soc, Div Prevent & Social Med, S-58185 Linkoping, Sweden
[5] Linkoping Univ Hosp, Div Internal Med, Dept Med & Care, S-58185 Linkoping, Sweden