Blood grouping : ABO blood group system

In ABO system, there are four main types of blood groups: A, B, AB, and O. Identification of these four blood groups is based on presence or absence of A and...

About Robert Zinn

Robert Zinn, M.D., Ph.D. is a medical doctor, physician, and web entrepreneur, who, for over 15 years was employed by academic and research institutions and focused his clinical practices on very specialized patient populations, such as those with rare genetic diseases or rare cancers. He shares his knowledge through his website,

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