TPO and rheumatoid arthritis: Fourteen patients had autoimmune conditions prior to the start of their treatment, which included polymyalgia (n = 1), rheumatoid arthritis (n = 2), seronegative-inflammatory arthritis (n = 1), psoriasis (n = 1), Crohn's disease (n = 1), ulcerative colitis (n = 1), thyroid peroxidase antibody (TPO)-positive thyroiditis (n = 1), lichen sclerosus (n = 1) and sarcoidosis (n = 1).