[1] Univ Calif Los Angeles, Providence St Johns Hlth Ctr, John Wayne Canc Inst, Clin Trials & Res,Sch Nursing, 2200 Santa Monica Blvd, Santa Monica, CA 90404 USA
[2] Univ Calif Los Angeles, Sch Nursing, 700 Tiverton Ave, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Dept Psychol, 1285 Franz Hall,Box 951563, Los Angeles, CA 90095 USA
[4] Univ Calif Irvine, Nursing Sci, 106 Berk Hall, Irvine, CA 92697 USA
[5] Providence St Johns Hlth Ctr, John Wayne Canc Inst, Dept Translat Neurooncol & Neurotherapeut, 2200 Santa Monica Blvd, Santa Monica, CA 90404 USA
[6] Univ Kansas, Sch Nursing, Med Ctr, Mail Stop 2029,3901 Rainbow Blvd, Kansas City, KS 66160 USA