[1] Med Univ Vienna, Div Haematol & Haemostaseol, Dept Internal Med 1, A-1090 Vienna, Austria
[2] Univ Michigan, Div Allergy & Immunol, Dept Internal Med, Ann Arbor, MI 48109 USA
[3] Hosp Ramon & Cajal, Unidad Mastocitosis, Hematol Serv, E-28034 Madrid, Spain
[4] Med Univ Vienna, Clin Inst Med & Chem Lab Diagnost, Vienna, Austria
[5] Tech Univ Munich, Dept Dermatol & Allergy Biederstein, D-8000 Munich, Germany
[6] Univ Cologne, Clin Dermatol & Venerol, D-5000 Cologne 41, Germany
[7] Univ Cologne, Polyclin Dermatol & Venerol, D-5000 Cologne 41, Germany
[8] Harvard Univ, Brigham & Womens Hosp, Sch Med, Div Rheumatol Immunol & Allergy, Boston, MA 02115 USA
[9] Univ Groningen, Ctr Med, Dept Haematol, NL-9700 AB Groningen, Netherlands
[10] Leiden Univ, Ctr Med, Dept Endocrinol & Metab Dis, NL-2300 RA Leiden, Netherlands
[11] Univ Paris 05, Hop Necker Enfants Malades, Serv Maladies Infect, F-75270 Paris 06, France
[12] NHLBI, Haematol Branch, NIH, Bethesda, MD 20892 USA
[13] Univ Tubingen, Inst Pathol, D-72074 Tubingen, Germany
[14] Univ Hosp Groningen, Dept Allergol, Groningen, Netherlands
[15] Ecole Normale Super, CNRS, UMR 8113, LBPA, Cachan, France
[16] Univ Paris 05, Assistance Publ Hop Paris, Hop Necker Paris, Dept Adult Haematol, F-75005 Paris, France
[17] Univ Paris 05, Assistance Publ Hop Paris, Hop Necker Paris, CNRS,UMR 8147, F-75005 Paris, France
[18] Med Univ Gdansk, Dept Haematol, Gdansk, Poland
[19] Univ Naples Federico II, Fac Med & Chirurg, Cattedra Immunol Clin & Allergol, Naples, Italy
[20] Med Univ Gdansk, Dept Allergol, Gdansk, Poland
[21] Virginia Commonwealth Univ, Dept Internal Med, Div Rheumatol Allergy & Immunol, Richmond, VA 23284 USA
[22] Univ Salamanca, Serv Cent Citometria, Ctr Invest Canc, E-37008 Salamanca, Spain
[23] Univ Salamanca, Dept Med, E-37008 Salamanca, Spain
[24] Univ Schleswig Holstein, Inst Pathol, Lubeck, Germany
[25] NIAID, Lab Allerg Dis, NIH, Bethesda, MD 20892 USA