[1] Univ Tours, F-37000 Tours, France
[2] CHRU Tours, Serv Dermatol, Unite Dermatol Pediat, F-37044 Tours 9, France
[3] CHU Toulouse, Serv Dermatol, F-31059 Toulouse 9, France
[4] Ctr Hosp le Mans, Serv Dermatol, F-72000 Le Mans, France
[5] UMR INRA, ISP 1282, F-37000 Tours, France
[6] INSERM, U930, F-37000 Tours, France