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Armand J. Quick, M.D.
JAMA. 1954;156(15):1427. doi:10.1001/jama.1954.02950150049020.
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To the Editor:—  The article of Sussman, Cohen, and Gittler (J.A.M.A.156:702 [Oct. 16] 1954) entitled "Clinical Application of Simplified Serum Prothrombin Consumption Test" has as its opening statement: "The serum prothrombin consumption test, described by Quick, has not been commonly used because of its complicated technique." I am inclined to question whether that is the reason for the slow acceptance of the test. It is much more likely that a better explanation can be found in the inertia with which any new ideas and methods are accepted and recognized, irrespective of their value and significance. My prothrombin time test shared the same fate in the early years, but, with the discovery of vitamin K and the isolation of bishydroxycoumarin (Dicumarol) from spoiled sweet clover hay, recognition of its value in clinical medicine was not long delayed.In regard to the complexity of my prothrombin consumption time


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