'Abcess' presentation slideshows

Extra Pulmonary Tuberculosis Case Reports

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Blood Types

Blood Types. A B AB O. Four major types of blood . A, B, AB, and O . Inherited from parents. Determined by presence or absence of an ANTIGEN on the surface of the red blood cell. In 1901, Austrian immunologist: Karl Landsteiner discovered blood may be grouped into four main types.

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