[1] Univ Southampton, Fac Hlth Sci, Southampton, Hants, England
[2] Radboud Univ Nijmegen, Dept Med Psychol, Med Ctr, Nijmegen, Netherlands
[3] Univ Agder, Fac Hlth & Sport Sci, Kristiansand, Norway
[4] Jagiellonian Univ, Dept Med Educ, Coll Med, Krakow, Poland
[5] UCL, Marie Curie Palliat Care Res Dept, London, England
[6] UCL, Div Psychiat, London, England
[7] Torbay Hosp, Torquay, England
[8] Sorlandet Hosp, Dept Clin Res, Kristiansand, Norway