title: Changes in level of precision of common ligand assays during a seven-year interval.
abstract: Nine commonly performed radioligand analyses were studied for periods of four to seven years in terms of change in level of precision. Consistent improvement in precision is generally observed, except in specific instances when pool characteristics are altered to study sensitivity and crossreactivity.
mesh_terms: D000704:Analysis of Variance; D004077:Digoxin / Q000097:blood; D005492:Folic Acid / Q000097:blood; D006728:Hormones / Q000097:blood; D006801:Humans; D007753:Laboratories / Q000592:standards*; D010336:Pathology; D011786:Quality Control; D011869:Radioligand Assay / Q000592:standards*; D012955:Societies, Medical; D014481:United States; D014805:Vitamin B 12 / Q000097:blood
chemical_list: D006728:Hormones; D004077:Digoxin; D005492:Folic Acid; D014805:Vitamin B 12