title: Statistical considerations in selecting a thromboplastin preparation as a standard.
mesh_terms: D001681:Biological Assay; D006801:Humans; D066298:In Vitro Techniques; D008722:Methods; D011517:Prothrombin Time / Q000592:standards*; D013223:Statistics as Topic; D013925:Thromboplastin / Q000592:standards*
chemical_list: D013925:Thromboplastin