<qa>  What is the name of the treatment that can be used for patients with rapidly proliferative5. Hydroxyurea for patients with rapidly proliferative disease can be used up to 24 hours prior to therapy but not concomitantly with 5-azacitidine or lenalidomide. Hydroxyurea can be used once the patient has completed the planned 5 azacitidine and lenalidomide treatment. 