Phase 1/2 Study of CD19 Chimeric Antigen Receptor T-cell (CD19 CAR-T; PL001) for Relapsed or Refractory B-cell Lymphoma

"Drug: Fludarabine~patients will receive a lymphodepletion chemotherapy with Fludarabine 25 mg/m2/day IV for 3 days on Day-5 to Day-3(a safe window for a small subset of patients will be D -7 to D -3).~Drug: Cyclophosphamide~patients will receive a lymphodepletion chemotherapy with cyclophosphamide 300 mg/m2/day IV for 3 dys Day-5 to Day-3(a safe window for a small subset of patients will be D -7 to D -3).~Biological: CD19 CAR-T~CD19 CAR-T cells will be administered using as a single dose at 0.1-9\*10\^6 cells/kg on Day 0 after completion of the lymphodepletion chemotherapy. The body weight calculated for PL001 dose is the actual body weight on the day of leukapheresis."