[1] Univ Porto, Fac Med, Ctr Hlth Technol & Serv Res CINTESIS, Porto, Portugal
[2] Univ Porto, Fac Med, Dept Community Med Informat & Hlth Decis Sci MEDC, Porto, Portugal
[3] Inst & Hosp CUF, Allergy Unit, Porto, Portugal
[4] Polytech Inst Porto, Porto Hlth Sch, Dept Cardiovasc & Resp Sci, Porto, Portugal
[5] Uppsala Univ, Dept Womens & Childrens Hlth, Pediat Res, Uppsala, Sweden
[6] Ctr Hosp Vila Nova De Gaia Espinho, Serv Imunoalergol, Unidade 1, Vila Nova De Gaia, Portugal
[7] Hosp Univ Coimbra, Serv Pneumol, Coimbra, Portugal
[8] Hosp Dist Figueira Da Foz, Serv Pneumol, Figueira Da Foz, Portugal
[9] Ctr Hosp & Univ Coimbra, Serv Imunoalergol, Coimbra, Portugal
[10] Ctr Hosp Leiria, Imunoalergol, Leiria, Portugal
[11] Ctr Hosp Univ Porto, Ctr Materno Infantil Norte, Serv Pediat, Porto, Portugal
[12] Ctr Hosp Univ Lisboa Cent, Hosp Dona Estefania, Serv Imunoalergol, Lisbon, Portugal
[13] Ctr Hosp Baixo Vouga, Hosp Infante D Pedro, Serv Imunoalergol, Aveiro, Portugal
[14] Hosp Beatriz Angelo, Serv Pneumol, Loures, Portugal
[15] Hosp Senhora Oliveira, Serv Pediat, Guimaraes, Portugal
[16] Ctr Hosp Univ Sao Joao, Serv Imunoalergol, Porto, Portugal
[17] Ctr Hosp Univ Porto, Serv Imunoalergol, Porto, Portugal
[18] Ctr Hosp Univ Lisboa Norte, Hosp Santa Maria, Serv Imunoalergol, Lisbon, Portugal
[19] Ctr Hosp Univ Lisboa Cent, Hosp Santa Marta, Serv Pneumol, Lisbon, Portugal
[20] Hosp Pedro Hispano, Serv Pediat, Unidade Local Saude Matosinhos, Matosinhos, Portugal
[21] Hosp Amato Lusitano, Serv Imunoalergol, Unidade Local Saude Castelo Branco, Castelo Branco, Portugal
[22] Ctr Hosp Univ Algarve, Serv Imunoalergol, Portimao, Portugal
[23] Hosp Garcia Orta, Serv Pneumol, Almada, Portugal
[24] Serv Saude Reg Autonoma Madeira, Serv Imunoalergol, Funchal, Portugal
[25] Hosp Divino Espirito Santo, Serv Imunoalergol, Ponta Delgada, Portugal
[26] Hosp Sao Pedro Vila Real, Ctr Hosp Tras Os Montes & Alto Douro, Serv Imunoalergol, Vila Real, Portugal
[27] Unidade Hosp Famalicao, Serv Pediat, Ctr Hosp Medio Ave, Vila Nova De Famalicao, Portugal
[28] Hosp Nossa Senhora Rosario, Ctr Hosp Barreiro Montijo, Serv Pneumol, Barreiro, Portugal
[29] Hosp Pedro Hispano, Unidade Imunoalergol, Unidade Local Saude Matosinhos, Matosinhos, Portugal
[30] Univ Porto, Fac Med, Imunol Bas & Clin, Porto, Portugal
[31] Cova Beira Univ Hosp Ctr, Dept Allergy & Clin Immunol, Covilha, Portugal
[32] Univ Beira Interior, CICS Hlth Sci Res Ctr, Covilha, Portugal
[33] NuESA Environm & Hlth Study Grp, Fac Hlth Sci, Covilha, Portugal
[34] Ctr Hosp Lisboa Norte, Hosp Santa Maria, Dept Pediat, Lisbon, Portugal
[35] Ctr Hosp & Univ Coimbra, Serv Pediat Ambulatoria, Coimbra, Portugal
[36] Hosp Sao Teotonio, Ctr Hosp Tondela Viseu, Serv Pediat, Viseu, Portugal
[37] Ctr Hosp Vila Nova De Gaia Espinho, Serv Pneumol, Unidade 1, Vila Nova De Gaia, Portugal
[38] MEDIDA Med Educ Invest Desenvolvimento & Avaliaca, Porto, Portugal