Clinical Study of TA-650 in Patients With Behcet's Disease (BD) With Special Lesions

TA-650 will be intravenously infused at a dosage of 5 mg/kg slowly over a period of more than 2 hours at the first administration (weeks 0), 2, and 6, and then every 8 weeks up to week 46. If the criteria for a dosage escalation are met at the evaluation after week 30, TA-650 will be administered at a dosage of 10 mg/kg after week 30.