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The Clinical Respiratory Journal > 12 > 2 > 410 - 417
Current Allergy and Asthma Reports > 2014 > 14 > 9 > 1-7
Current Allergy and Asthma Reports > 2013 > 13 > 6 > 662-671
Respiratory Medicine > 2009 > 103 > Supplement 2 > S12-S20