The Partial Thromboplastin Time with Kaolin: A Simple Screening Test for First Stage Plasma Clotting Factor Deficiencies

The Partial Thromboplastin Time with Kaolin: A Simple Screening Test for First Stage Plasma Clotting Factor Deficiencies Robert R. Proctor, M.D., Robert R. Proctor, M.D. University of Southern California Medical School, Los Angeles, California Search for other works by this author on: Oxford Academic Google Scholar Samuel I. Rapaport, M.D. Samuel I. Rapaport, M.D. University of Southern California Medical School, Los Angeles, California Search for other works by this author on: Oxford Academic Google Scholar American Journal of Clinical Pathology, Volume 36, Issue 3, 1 September 1961, Pages 212–219, https://doi.org/10.1093/ajcp/36.3.212 Published: 01 September 1961 Article history Received: 24 January 1961 Revision received: 04 April 1961 Accepted: 31 May 1961 Published: 01 September 1961