Any subject presenting with symptoms indicating a potential autoimmune disorder was to be evaluated per standard medical practice. All effort was to be made to obtain records of any diagnostic workup conducted by outside physicians. NiLPT, chromium LPT, serum or plasma nickel level, and serum or plasma titanium level and serum inflammatory cytokines samples were also to be drawn by the study site. An appropriate human leukocyte antigen (HLA) panel was to be run on previously obtained baseline samples if sufficient sample existed.
After the evaluation of the subject was complete, all information was to be forwarded to the adjudication committee in a blinded fashion, regardless of investigator's assessment as to whether or not an autoimmune disorder existed. Final determination of whether or not an autoimmune disorder had occurred was based on the determination of this committee.