1. Department of Dermatology, Agencia Sanitaria Costa del Sol, Marbella, Spain
2. Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Spain
3. Unit of Investigation, Agencia Sanitaria Costa del Sol, Marbella, Spain
4. Department of Dermatology, University of Sydney, Sydney, NSW, Australia
5. Department of Otolaryngology and Communication, Sciences Medical College of Wisconsin, Milwaukee, WI, USA