1. Department of Dermatology; Son Espases Universitari Hospital; Palma de Mallorca; Balearic Islands; Spain
2. Colorectal Surgery Department; Son Espases Universitari Hospital; Palma de Mallorca; Balearic Islands; Spain
3. Department of Dermatology; Kurume University School of Medicine; and Kurume University Institute of Cutaneous Cell Biology; Fukuoka Japan