Lötvall J, Akdis CA, Bacharier LB, Bjermer L, Casale TB, Custovic A, Lemanske RF, Wardlaw AJ, Wenzel SE, Greenberger PA (February 2011). "Asthma endotypes: a new approach to classification of disease entities within the asthma syndrome". The Journal of Allergy and Clinical Immunology. 127 (2): 355–60. doi:10.1016/j.jaci.2010.11.037. PMID21281866.
Lötvall J, Akdis CA, Bacharier LB, Bjermer L, Casale TB, Custovic A, Lemanske RF, Wardlaw AJ, Wenzel SE, Greenberger PA (February 2011). "Asthma endotypes: a new approach to classification of disease entities within the asthma syndrome". The Journal of Allergy and Clinical Immunology. 127 (2): 355–60. doi:10.1016/j.jaci.2010.11.037. PMID21281866.