1. Mental Health Center, West China Hospital of Sichuan University, Chengdu, China
2. Department of Psychiatry and Biobehavioral Sciences, UCLA Semel Institute for Neuroscience, David Geffen School of Medicine, Los Angeles, CA, USA
3. Department of Physics, University of California, Irvine, CA, USA
4. Sichuan Provincial Compulsory Drug Addiction Treatment Agency for Females, Deyang, China
5. Sichuan Provincial Compulsory Drug Addiction Treatment Agency for Males, Ziyang, China
6. Department of Molecular and Medical Pharmacology, University of California Los Angeles, Los Angeles, CA, USA