Centre Hospitalier Universitaire (CHU) de Bordeaux, Pediatrics Department, Pediatric Pulmonology, CEDEX, 33076 Bordeaux, France 2 Centre Hospitalier d’Agen-Nérac, Pediatrics Department, 47000 Agen, France 3 Paediatric Department, Seychelles Hospital, Victoria P.O. Box 52, Seychelles ...