https://www.wls-dialysis.com/how-does-w-t2008-b-hemodialysis-machine-ensure-precise-ultrafiltration-and-patient-safety-in-dialysi/ 0.9 weekly https://www.wls-dialysis.com/what-are-the-key-technical-specifications-of-high-volume-on-line-hdf-hemodialysis-machines-for-kidne/ 0.9 weekly