Six years of INSTAND e.  V. sIgE proficiency testing

ConclusionThe numerous publications that have found discrepancies in the sIgE results of the different suppliers did not change the status quo within the last six years. Unfortunately, this is unlikely to change until there is a  characterized standard material with known values of sIgE.
Source: Allergo Journal International - Category: Allergy & Immunology Source Type: research