Non-atopic persistent asthma in childrenHenderson, JGranell, RSterne, JAuthor informationAvon Longitudinal Study of Parents and Children (ALSPAC), University of Bristol, Bristol, UKCorrespondence to: Dr J Henderson, ALSPAC, University of Bristol, Bristol BS8 2BN, UK; [email protected]Thorax 64(5):p 459, May 2009.Copyright © 2009 BMJ Publishing Group Ltd & British Thoracic Society