- Severe comorbidities (diabetes mellitus requiring insulin, Q F of any severity, MI, unstable angina eectoris, uncontrolled hypertension, oxygendependent severe pulmonary disease, history of cancer *thin 5_ years except cutaneous basal cell or squamous cell carcinoma or in situ cervical carcinoma, history of TB or TB exposure, chronic hepatitis B or C, SLE, history of multiple sclerosis, transverse myelitis, optic neuritis or epilepsy