[1] Mid Sweden Univ, Dept Hlth Sci, Sundsvall, Sweden
[2] Univ Calif San Francisco, Dept Social & Behav Sci, San Francisco, CA USA
[3] Univ Calif San Francisco, Osher Ctr Integrat Med, San Francisco, CA 94143 USA
[4] Netherlands Canc Inst, Sci Informat Serv, Amsterdam, Netherlands
[5] Summit, Portland, OR USA
[6] Sorlandet Hosp Hlth Enterprise, Dept Child & Adolescent Mental Hlth, Kristiansand, Norway
[7] Arctic Univ Norway UiT, Fac Hlth Sci, Natl Res Ctr Complementary & Alternat Med NAFKAM, Dept Community Med, Tromso, Norway