1. School of Veterinary Medicine and Science, University of Nottingham, Loughborough, United Kingdom.
2. Department of Genetics and Genome Biology, University of Leicester, Leicester, United Kingdom.
3. COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark.
4. School of Life Sciences, University of Warwick, Coventry, United Kingdom.
5. School of Biosciences, University of Nottingham, Loughborough, United Kingdom.