1. Department of Dermatology; Seoul National University College of Medicine; Seoul Korea
2. Laboratory of Cutaneous Aging Research; Biomedical Research Institute; Seoul National University Hospital; Seoul Korea
3. Department of Anatomy; Seoul National University College of Medicine; Seoul Korea
4. Department of Dermatology, Venereology, Allergology and Immunology; Dessau Medical Center; Brandenburg Medical School Theodor Fontane; Dessau Germany