8. Chronic or relevant acute infections including HIV, viral hepatitis and (or) tuberculosis or evidence of tuberculosis infection as defined by a positive QuantiFERON TB-Gold (or T-SPOT) test. Subjects with a positive QuantiFERON TB-Gold (or T-SPOT) test may participate in the study if further work up (according to local practice/guidelines) establishes conclusively that the subject has no evidence of active tuberculosis. If presence of latent tuberculosis is established, then treatment must have been initiated and maintained according to local country guidelines.