title: Guidelines for clinical chemistry quality control based on the long-term experience of sixty-one university and tertiary care referral hospitals. A reappraisal.
mesh_terms: D001322:Autoanalysis / Q000592:standards; D002624:Chemistry, Clinical; D006761:Hospitals; D006785:Hospitals, University; D007753:Laboratories / Q000592:standards*; D011786:Quality Control