[1] Hosp Virgen del Valle, Inst Estudios Mastocitosis Castilla La Mancha, Toledo, Spain
[2] Hosp Fuenlabrada, Allergy Unit, Madrid, Spain
[3] REMA, Madrid, Spain
[4] Hosp Gen Segovia, Dept Allergy, Segovia, Spain
[5] Hosp Guadalajara, Dept Allergy, Guadalajara, Spain
[6] Fdn Hosp Alcorcon, Allergy Unit, Madrid, Spain
[7] Hosp Ramon & Cajal, Dept Allergy, E-28034 Madrid, Spain
[8] Univ Navarra Clin, Allergy & Immunol Dept, Pamplona, Spain
[9] Univ Salamanca, Ctr Invest Canc IBMCC, Dept Med, E-37008 Salamanca, Spain
[10] Univ Salamanca, Serv Gen Citometria, E-37008 Salamanca, Spain