definition of a closed system drug transfer device established by NIOSH and should be required to demonstrate their effectiveness in independent studies". See also USP 800 References External links American Society of Health-System Pharmacists (ASHP) National Institute for Occupational Safety and Health (NIOSH) Oncology Nursing Society (ONS) The International Agency for Research on Cancer (IARC) Classification of Hazardous Drugs International Society of Oncology Pharmacy Practitioners (ISOPP) Clinical pharmacology Pharmacy