Dr Bouhanna is a dermatologist, exclusively devoted to scalp surgery. Through the publications of 11 books and a hundred articles in french, english and other languages, he has particulary researched, and is thus, experienced in:-Performing and comparing the results of the FUE and FUS (micro-grafts and follicular units) techniques in both men and women.-Long hair micrografts technique-Specific implantation for African and Asian patients-Techniques for grafting the eyebrows, beard, pubic area, in addition to scars -The effect and efficacy of molecules such as minoxidil or finasteride on hair transplants-The "Multifactorial classification for alopecia".