This editorial discusses the findings in the paper by Eyers et al.  pp. 482-489.
Correspondence: Shyamali C. Dharmage, Centre for Molecular, Environmental, Genetic & Analytic (MEGA) Epidemiology, School of Population Health, The University of Melbourne, Carlton, Vic. 3052, Australia. E-mail: email@example.com
Cite this as: S. C. Dharmage and K. J. Allen, Clinical & Experimental Allergy, 2011 (41) 459–460.