However, our interviews with personswith MS confirmed findings reported in other qualitative studies that some personswith MS still exhibited anger for being misdiagnosed for years or relief at finallybeing given a correct diagnosis.31–33 Also noteworthy are some indicators that did not meet thresholds of validity.The lowest rated indicator was antibody testing for persons using beta-interferon.Competing guidelines recommend different courses of action about this topic,reflecting uncertainty among experts.34,35. This evidence concerns the gene IFNB1 and myeloid sarcoma.