A Trial Investigating the Mechanism of Action of NNC0109-0012 (Anti-IL-20 mAb) Through Synovial Biopsies in Subjects With Rheumatoid Arthritis and an Inadequate Response to Methotrexate

Solution for injection administered subcutaneously (s.c. - under the skin). 240 mg NNC0109-0012 will be administered weekly for 12 weeks

Solution for injection administered subcutaneously (s.c. - under the skin). Administered every other week for 12 weeks; Each active treatment involves 1 (one) s.c. injection of adalimumab 40 mg/0,8 mL solution for injection for paediatric use (Humira®)

"Solution for injection administered subcutaneously (s.c. - under the skin).~1 active adalimumab injection and 2 placebo injections per active treatment (every other week), and 3 placebo injections on placebo visits (alternative weeks)."