Opportunistic infection within the last 3 months Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Active opportunistic infection or treatment for opportunistic infection within four weeks of first day of study drug dosing No previous evidence of opportunistic infection Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Uncontrolled opportunistic infection or treatment for opportunistic infection within 4 weeks of first day of study drug dosing Concurrent opportunistic infections Concurrent opportunistic infections Active infections, including opportunistic infections Concurrent opportunistic infections Opportunistic infections Concurrent opportunistic infections Concurrent opportunistic infections Patients with opportunistic viral infections other than CMV