[1] Med Univ Gdansk, Dept Allergol, Gdansk, Poland
[2] Tech Univ Munich, Sch Med, Dept Dermatol & Allergy Biederstein, Munich, Germany
[3] Azienda Osped Univ Integrata Verona, Allergy Unit, Verona, Italy
[4] Med Univ Gdansk, Dept Dermatol Venereol & Allergol, Gdansk, Poland
[5] Univ Groningen, Univ Med Ctr Groningen, Dept Hematol, Groningen, Netherlands
[6] Univ Antwerp, Campus Drie Eiken, Antwerp, Belgium
[7] Med Ctr Univ Freiburg, Dept Med 1, Freiburg, Germany
[8] Uniklin Koln, Dermatol, Cologne, Germany
[9] Brno Univ Hosp, Brno, Czech Republic
[10] AKH Linz, Linz, Austria
[11] Hop Necker Enfants Malad, Serv Hematol Adulte, Paris, France
[12] Grp Hosp Pitie Salpetriere, Paris, France
[13] IRCCS Fdn Policlin San Matteo, Pavia, Italy
[14] Istanbul Univ, Istanbul Fac Med, Istanbul, Turkey
[15] Med Univ Graz, Univ Klin Dermatol, Graz, Italy
[16] Azienda Osped, Pediat Dermatol, Internal Med, Padua, Italy
[17] Semmelweis Univ Budapest, Budapest, Hungary
[18] Stanford Univ, Sch Med, Hematol Clin, Stanford, CA 94305 USA
[19] Uniklin RWTH Aachen, Aachen, Germany
[20] Univ Klinikum Leipzig AoR, Leipzig, Germany
[21] Univ Med Mannheim, Med Klin 3, Mannheim, Germany
[22] Univ Salerno, Salerno, Italy
[23] Uppsala Univ Hosp, Uppsala, Sweden
[24] UZ Leuven, Campus Sint Rafael, Leuven, Belgium
[25] Med Univ Gdansk, Dept Allergol, Gdansk, Poland
[26] Univ Verona, Sect Hematol, Dept Med, Verona, Italy
[27] Univ Padua, Pediat Dermatol, Internal Med, Azienda Osped, Padua, Italy
[28] Dept Internal Med I, Div Hematol & Hemostaseol, Vienna, Austria
[29] Univ Basel, Div Allergy, Dept Dermatol, Basel, Switzerland
[30] Med Univ Vienna, Div Hematol & Hemostaseol, Dept Internal Med 1, Vienna, Austria
[31] Med Univ Vienna, Ludwig Boltzmann Inst Hematol & Oncol, Vienna, Austria