[1] Univ Libre Bruxelles, Dept Dermatol & Dermatopathol, HUDERF Hosp, B-1000 Brussels, Belgium
[2] Univ Libre Bruxelles, Hop St Pierre, B-1000 Brussels, Belgium
[3] Univ Libre Bruxelles, Dept Paediat, HUDERF Hosp, B-1000 Brussels, Belgium
[4] Univ Strasbourg, Hop Civil, Dept Dermatol, Strasbourg, France
[5] Tivoli Hosp, Dept Paediat, La Louviere, Belgium