1. Department of Epidemiology and Biostatistics, Program in Public Health, University of California, Irvine, Irvine, California, USA
2. Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
3. Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles, California , USA
4. Program in Public Health, University of California, Irvine, Irvine, California, USA
5. Department of Population Health and Disease Prevention and the Chao Family Comprehensive Cancer Center, Susan and Henry Samueli College of Health Sciences, University of California, Irvine, Irvine, California, USA
6. Department of Medicine, the Chao Family Comprehensive Cancer Center, University of California, Irvine, Irvine, California, USA