*Stapel SO, Asero R, Ballmer-Weber BK, Knol EF, Strobel S, Vieths S, Kleine-Tebbe J; Testing for IgG4 against foods is not recommended as a diagnostic tool: EAACI Task Force Report., Allergy. 2008 Jul;63(7):793-6. doi: 10.1111/j.1398-9995.2008.01705.x. Epub Mai 2008