1. 673 Pre and Post Bronchodilator Airway Resistance Values in Children with Asthma Using Airflow Perturbation Device (Apd). (October 2012) Authors: Rostami, N; Bautista, M; Johnson, A; Vossoughi, J; Kezsler, M Journal: Archives of disease in childhood Issue: Volume 97(2012)Supplement 2 Page Start: A194 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗