35 Management services, administrative services, and purchasing services to centers for treatment of chronic kidney disease, dialysis clinics and related healthcare operations; Business management assistance in the operation of centers for treatment of chronic kidney disease, dialysis clinics and related healthcare operations; Billing, collecting, and receiving payment of fees; Coordinating the purchase or lease of equipment, supplies, and pharmaceuticals for operation of centers for treatment of chronic kidney disease, dialysis clinics and related healthcare operations; Negotiate contracts; maintain licenses, permits and certificates required for the operation of centers for treatment of chronic kidney disease, dialysis clinics and related healthcare operations; Human resource services, staffing, payroll services, benefits services, and staff recruitment services in the field of renal care; Training and continuing education in the field of renal care; experience operator services, namely, in-hospital therapy, in-center therapy, and home therapy; Physician recruitment; Marketing