1. Department of Dermatology, University of California, San Francisco
2. Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia
3. Department of Psychiatry and Behavioral Sciences, University of California, San Francisco
4. Department of Pediatrics, University of California, San Francisco
5. Department of Epidemiology and Biostatistics, University of California, San Francisco
6. Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
7. Division of Epidemiology, School of Public Health, University of California, Berkeley