Regarding the clinical features, patients with radiculitis (n = 9) had significantly higher BAFF levels at baseline (p = 0.034), and patients with arthralgia and/or myalgia (n = 8) had significantly higher BAFF levels at the 1-month follow-up (p = 0.020) as compared with patients without these symptoms. Here, TNFSF13B is linked to radiculitis.