1 Department of Internal Medicine I, Division of Haematology, Medical University of Vienna, Vienna, Austria. Electronic address: peter.valent@meduniwien.ac.at.
2 Division of Allergy and Clinical Immunology, University of Michigan, Ann Arbor, Mich.
3 Allergy Unit, Verona University Hospital, Verona, Italy.
4 Department of Dermatology, University of Luebeck, Luebeck, Germany.
5 Department of Dermatology and Allergy Centre Odense University Hospital, Odense, Denmark.
6 Department of Dermatology and Allergy Biederstein, Technical University of Munich, Munich, Germany.
7 Division of Allergic Diseases, Mayo Clinic, Rochester, Minn.
8 III Medizinische Klinik, Universitäts-Medizin Mannheim, Universität Heidelberg, Mannheim, Germany.
9 Stanford Cancer Institute/Stanford University School of Medicine, Stanford, Calif.
10 Division of Allergy and Immunology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass.
11 Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Md.
12 Department of Haematology, Guys and St Thomas' NHS Foundation Trust, Guys Hospital, London, United Kingdom.
13 Division of Hematology, Mayo Clinic, Rochester, Minn.
14 Institute of Pathology, Paracelsus Medical University Salzburg, Salzburg, Austria.
15 Division of Allergy and Clinical Immunology University of Salerno, Salerno, Italy.
16 Institute of Pathology, Ludwig-Maximilians-Universität, Munich, Germany.
17 LBPA CNRS UMR8113, Ecole Normale Supérieure de Cachan, Cachan, France.
18 Department of Internal Medicine, Division of Rheumatology, Allergy & Immunology, Virginia Commonwealth University, Richmond, Va.