[1] CRCM, Hop Robert Debre, Serv Pneumol & Allergol Pediat, 48 Blvd Serurier, F-75019 Paris, France
[2] Ctr Rech Epidemiol & Sante Populat Epidemiol Resp, Inserm 1018, Villejuif, France
[3] Univ Clermont Auvergne, Inst Pascal, UMR 6602, Clermont Ferrand, France