- Correspondence to Dr Sean Semple, Scottish Centre for Indoor Air, Division of Applied Health Sciences, University of Aberdeen, Room 29.04a, Child Health, Royal Aberdeen Children's Hospital, Westburn Road, Aberdeen AB25 2ZD, UK;
- Received 22 August 2011
- Accepted 12 December 2011
- Published in print 1 November 2012.
- Published online 17 October 2012.
- Published first 4 January 2012.
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