[1] Univ Calif Los Angeles, Sch Nursing, Los Angeles, CA 90024 USA
[2] Calif State Univ Fullerton, Fullerton, CA 92634 USA
[3] Kaiser Permanente, Los Angeles Med Cntr, Los Angeles, CA USA
[4] Univ Calif Los Angeles, Semel Inst, Cousins Cntr Psychoneuroimmunol, Los Angeles, CA USA