Rusconi Franca, Fernandes Ricardo M, Pijnenburg Mariëlle W H, Grigg Jonathan
Epidemiology Unit, Anna Meyer Children's University Hospital, Florence, Italy.
Dept of Pediatrics, Hospital de Santa Maria, Lisbon, Portugal.
Eur Respir J. 2018 Oct 18;52(4). doi: 10.1183/13993003.01665-2018. Print 2018 Oct.