1. Department of Surgery; Beckman Laser Institute and Medical Clinic; University of California, Irvine; Irvine CA 92617 U.S.A.
2. Department of Dermatology; Brigham and Women's Hospital; Harvard Medical School; Boston MA 02115 U.S.A.
3. Department of Dermatology; Xijing Hospital; Fourth Military Medical University; Xi'an 710032 China
4. The Third Xiangya Hospital; Xiangya School of Medicine; Central South University; Changsha Hunan 412000 China
5. Department of Pathology; Massachusetts General Hospital; Harvard Medical School; Boston MA 02114 U.S.A.
6. Department of Biomedical Engineering; University of California, Irvine; Irvine CA 92617 U.S.A.