Academic achievement of adolescents with asthma or atopic disease.

"CONFLICT OF INTEREST The authors declare no conflict of interest."

"The authors would like to gratefully acknowledge the children and parents of the CATSS twin cohort, without whose participation this study would have been impossible to perform. We are also indebted to Isabelle Kizling, Eva Carlström, Camilla Palm, and Christina Norrby, who contributed with excellent data collection and management. This work was supported by the Swedish Research Council through the Swedish Initiative for research on Microdata in the Social And Medical sciences (SIMSAM) framework (grant no 340‐2013‐5867); the Swedish Heart Lung Foundation; the Swedish Asthma and Allergy Association's Research Foundation, Swedish Research Council for Health, Working life and Welfare FORTE (grant no 2015‐00289) and grants provided by the Stockholm County Council (ALF project). Bronwyn Brew was supported by Forte and the Commission under a COFAS Marie Curie Fellowship (grant no 2015‐01208) and the Swedish Heart Lung Foundation."