In his Invest in ME London presentations, and various other conference presentations, see here:
Dr Chia, Symposium on Viruses in CFS 2008, timecode 10:34
Here Dr Chia explains how he calibrated the ARUP lab enterovirus antibody neutralization tests for use in ME/CFS viral infection diagnosis. The slide you see in that video is detailed further in
this post.
There various Invest in ME London videos by Dr Chia are very informative for learning all about enterovirus in ME/CFS. There's a list of these videos on Dr Chia's MEpedia page.
For a deeper understanding of chronic enterovirus infections, see Prof Nora Chapman's Invest in ME London videos.
(But we are taking this thread off topic somewhat, as this thread is mainly focused on the significant difficulties in getting ARUP Lab tests).