Acknowledgements
The European Academy of Allergy and Clinical Immunology (EAACI) funded the systematic review to support the update of the guideline on IgE-mediated FA diagnosis. The funder had no role in the development of the protocol, conduct or write up of the review or decision to publish. The authors would like to acknowledge input in the initial stages of the SR from Drs. Jon Genuneit, Daniel Munblit and Robert Boyle.