[1] Klinikum Ludwig Maximillians Univ, Klin & Poliklin Dermatol & Allergol, Munich, Germany
[2] Georg August Univ, Univ Med Gottingen, Abt Dermatol & Venerol, Gottingen, Germany
[3] FAZ, Vienna, Austria
[4] Spital Ziegler, Allergie Stn, Bern, Switzerland