Risk factors for asthma and allergy associated with urban migration: background and methodology of a cross-sectional study in Afro-Ecuadorian school children in Northeastern Ecuador (Esmeraldas-SCAALA Study)
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Á. Cruz | M. Barreto | P. Cooper | M. Chico | M. Vaca | R. Stein | L. Rodrigues | B. Genser | L. P. D. de Carvalho | N. Alcântara-Neves | Alejandro Rodriguez | Alejandro Rodríguez | Bernd Genser | P. J. Cooper | Lain Pontes de Carvalho | Renato T. Stein | Alvaro A Cruz | Laura C Rodrigues | M. L. Barreto