1 Department of Dermatology (Li, Wu), Taipei Veterans General Hospital; Faculty of Medicine (Li, Wu), School of Medicine, and Institute of Public Health and Department of Public Health (Wu), and Department of Dermatology (Wu), National Yang Ming Chiao Tung University, Taipei, Taiwan.
2 Department of Dermatology (Li, Wu), Taipei Veterans General Hospital; Faculty of Medicine (Li, Wu), School of Medicine, and Institute of Public Health and Department of Public Health (Wu), and Department of Dermatology (Wu), National Yang Ming Chiao Tung University, Taipei, Taiwan. chenyiok@gmail.com.