[1] Univ Roma Tor Vergata, Dermatol Dept, Dept Syst Med, Rome, Italy
[2] European Hidradenitis Suppurativa Fdn eV, Dessau Rosslau, Germany
[3] Univ Bologna, Div Dermatol, Dept Expt Diagnost & Specialty Med, Bologna, Italy
[4] Univ Brescia, Dermatol Dept, ASST Spedali Civili Brescia, Brescia, Italy
[5] Polytech Marche Univ, Dept Clin & Mol Sci, Dermatol Unit, Ancona, Italy