TY - STAND AU - Proctor, PR; Rapaport, SI TI - The partial thromboplastin time with kaolin PY - 1961 VL - 36 SP - 212 EP - 219 L3 - PubMed-ID: 13717432 N1 - A simple screening test for first stage plasma clotting factor deficiencies. Am J Clin Pathol ER -