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Journal Article Estimation of Prothrombin Level from Prothrombin Time* Get access Richard E. Rosenfield, M. D. , Richard E. Rosenfield, M. D. From the Departments of Pathology and Medicine, Montefiore Hospital, Pittsburgh, Pennsylvania Search for other works by this author on: Oxford Academic Google Scholar Harold S. Tuft, M. D. Harold S. Tuft, M. D. From the Departments of Pathology and Medicine, Montefiore Hospital, Pittsburgh, Pennsylvania Search for other works by this author on: Oxford Academic Google Scholar American Journal of Clinical Pathology, Volume 17, Issue 5ₜs, May 1947, Pages 405–412, https: //doi. org/10. 1093/ajcp/17. 5ₜs. 405 Published: 01 May 1947 Article history Received: 08 January 1947 Published: 01 May 1947
Rosenfield et al. (Thu,) studied this question.