Douwes, J; Brooks, C; van Dalen, C; Pearce, N; (2011) Importance of Allergy in Asthma: An Epidemiologic Perspective. Current allergy and asthma reports, 11 (5). pp. 434-444. ISSN 1529-7322 DOI: https://doi.org/10.1007/s11882-011-0215-6 Full text not available from this repository.