MAKE A MEME View Large Image Jan Janský, 1902.jpg prof MUDr Jan Janský 1873 -   1921 was a Czech serologist neurologist and psychiatrist He is credited with the first classification of blood into the four types A B AB O of the ABO blood group system Jan Janský in ...
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Keywords: Jan Janský, 1902.jpg prof MUDr Jan Janský 1873 -   1921 was a Czech serologist neurologist and psychiatrist He is credited with the first classification of blood into the four types A B AB O of the ABO blood group system Jan Janský in 1902 Source http //www vlast ic cz/vynalezy htm PD-old Jan Janský
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