[BMJ Publishing Group Ltd and Royal College of Paediatrics and Child Health 8th Europaediatrics Congress jointly held with, The 13th National Congress of Romanian Pediatrics Society, 7–10 June 2017, Palace of Parliament, Romania, Paediatrics building bridges across Europe - ()] Posters - P340 Exhaled nitric oxide level evaluation as an additory screening method for differential diagnosis asthma and other lung diseases in children