Find the missing text [*** *E****S]
Background picture associated with the solution.Correct answers: 48
The first user who solved this task is Sanja Šabović.
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Reuben Leon KahnBorn 26 Jul 1887; died 1979 .Major Reuben Leon Kahn was an American immunologist best known for his investigations of blood reactions, while a member of the U.S. Army Medical Service Corps, which led him to develop a procedure that became an efficient test for syphilis (1918). This is now the standard serological test. |