[1] Oslo Univ Hosp, Ctr Shared Decis Making & Nursing Res, Rikshosp, N-0023 Oslo, Norway
[2] Oslo Univ Coll, Fac Nursing, Oslo, Norway
[3] Oslo Univ Hosp, Dept Resp Med, Rikshosp, N-0023 Oslo, Norway
[4] Oslo Univ Hosp, Dept Surg, Rikshosp, N-0023 Oslo, Norway
[5] Univ Calif San Francisco, Dept Physiol Nursing, San Francisco, CA 94143 USA