Antonella Tosti is Professor of Clinical Dermatology at the Miller School of Medicine of the University of Miami, US. She is also well-known in Europe as she was Professor of Dermatology at the University of Bologna for 20 years. Her research involves hair, nail and cosmetic disorders. She is member of many dermatological societies including the ADA, AAD, EADV, WDS and ISD. She is author of more than 600 publications and 20 books, several of them very successfully with Springer. Doris Hexsel is a Board-certified dermatologist and dermatologic surgeon. She published more than 100 Publications and she is the editor of 4 medical books (Cosmetic Use of Botulinum Toxin, Botulinum Toxin and Hyperhidrosis, Cosmetic Procedures in Etnic Patients, and, two editions of the book Cellulite: Pathophysiology and Treatment). She is the main investigator of the Brazilian Center of Studies in Dermatology and an active member of a number of professional associations, such as the Brazilian Society of Dermatology, Brazilian Society of Dermatologic Surgery, American Academy of Dermatology, International Society for Dermatologic Surgery, American Society of Dermatologic Surgery and others. She sits in the International Committee of the American Society of Dermatologic Surgery and in the Board of Directors of the Brazilian Society for Dermatologic Surgery and International Society for Dermatologic Surgery.