Proceedings: Progress in proficiency testing of the one-stage prothrombin time in the Federal Republic of Germany.
D005860:Germany, West; D006801:Humans; D007753:Laboratories / Q000592:standards; D011517:Prothrombin Time / Q000592:standards*; D011786:Quality Control; D013925:Thromboplastin / Q000592:standards
D013925:Thromboplastin