[1] Univ Newcastle, Fac Hlth & Med, Lot 1 Kookaburra Circuit, New Lambton Hts 2305, Australia
[2] NHMRC Ctr Res Excellence Digest Hlth, New Lambton Hts, NSW, Australia
[3] Imperial Coll, Div Digest Dis, London, England
[4] Macquarie Univ, Dept Psychol, N Ryde, NSW, Australia
[5] Univ Oulu, Ctr Life Course Hlth Res, Oulu, Finland
[6] Primary Hlth Care Ctr, Tornio, Finland
[7] Karolinska Inst, Dept Med Solna, Solna, Sweden
[8] Gastromottagningen City, Stockholm, Sweden
[9] Uppsala Univ, Dept Med Sci, Uppsala, Sweden
[10] Arokero OY, Tornio, Finland
[11] Umea Univ, Dept Surg & Perioperatve Sci, Umea, Sweden
[12] Karolinska Inst, Dept Neurobiol Care Sci & Soc, Huddinge, Sweden
[13] Stockholm Univ, Stress Res Inst, Dept Psychol, Stockholm, Sweden