Anti-tranglutaminase-6 antibody test - Gluten Sensitivity Test

Has anyone in this group had the TG6 antibody test done? I am having trouble finding a lab in the US that conducts this specific test. I have read some articles regarding the Sheffield Teaching Hospitals in the UK conducting research and finding some links between gluten sensitivity with neurological symptoms and a positive TG6 antibody test. Professor Mario Hadjivassiliou is the medical researcher associated with this research.