non hodgkin lymphoma follicular typefollicular non hodgkin'snon follicular lymphomafollicular nonhodgkins lymphomaindolent follicular lymphomanhl follicular lymphomaslow growing follicular lymphomanon hodgkin lymphoma chemotherapynon hodgkin's lymphoma recurrenceaggressive non hodgkin lymphomanon hodgkin's lymphoma diagnosisnon hodgkin lymphoma prognosis