- Phase I is a dose escalation study of RAD001 in combination with one injection of Rituximab 375 mg/m² per week during 4 weeks (28 days) in patients CD20 positive non-Hodgkin's lymphomas to determine the dose limiting toxicities (DLTs) and maximum tolerated dose (MTD). The purpose of the study is to assess the feasibility of the combination based on - rate of dose limiting toxicities (DLT) and PK drug-drug interaction (DDI).