[1] Kermanshah Univ Med Sci, Dept Anesthesiol Crit Care & Pain Management, Kermanshah 6718818838, Iran
[2] Karolinska Inst, Dept Publ Hlth Sci, Div Social Med, Stockholm, Sweden
[3] Univ Alabama Birmingham, Dept Psychol, Birmingham, AL USA
[4] Charles R Drew Univ Med & Sci, Coll Med, Dept Psychol, Los Angeles, CA 90059 USA
[5] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA