[1] Univ Politecn Madrid, ETSI Agron, Unidad Bioquim, Dept Biotecnol, Madrid, Spain
[2] CSIC, Ctr Invest Biol, Serv Quim Prot, Madrid, Spain
[3] Fdn Jimenez Diaz, Serv Immunol, E-28040 Madrid, Spain
[4] Hosp Univ La Paz, Serv Alergia, Madrid, Spain
[5] Fdn Jimenez Diaz, Serv Alergia, E-28040 Madrid, Spain