This is a Phase IV, open label (all people know the identity of the intervention), multi-center, observational (a scientific study to make a clear and easy understanding of the cause and effect relationship) study of bendamustine. The study duration is of 24 Weeks to coincide with the 4 weeks-6 cycles bendamustine treatment. The study will run for three years, and will enroll 10 percent of patient who would use this product, as a requirement of the Philippine Food and Drug Administration (FDA). Approximately fifty patients will be enrolled in this study. Safety evaluations including adverse events, clinical laboratory tests, electrocardiogram, vital signs, and physical examination will be monitored throughout the study.