BOUDRY, Switzerland--(BUSINESS WIRE)--Celgene International Sàrl (NASDAQ: CELG) announced that clinical data from two investigational studies evaluating the use of REVLIMID® (lenalidomide) either with rituximab or following a rituximab-containing regimen in patients with chronic lymphocytic leukaemia (CLL) were presented at the 52nd American Society of Hematology annual meeting.