This registry is a multi-center, prospective, observational program that will gather and analyze data on patients being treated with biologics and targeted synthetic DMARDs in Korea. In contrast to a controlled clinical trial, there is no imposed experimental intervention and solely the patients' physicians will determine the patient's treatment. Thus, the data captured and reported in this registry will reflect a "real world" approach to the treatment with biologics or targeted synthetic DMARDs. There will be no additional visit or laboratory test done outside the routine clinical practice. The selection of the agent, dosing, and treatment duration is determined by the investigator. Informed consent will be obtained from the patient prior to the collection of any data.
