In 2005 I had 8 cycles of CHOP combined with Rituximab to treat follicular Non-Hodgkin-Lymphoma. Since then I get Rituximab containment therapy every three months, i.e. for more than three years now and apparently full remission as far as can be stated. My questions: 1) What experience is there with long-term-application of Rituximab (more than 2 years)? 2) Could the intervals be prolonged? Thank you very much.