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The ABO blood group system was discovered by Karl Land Steiner in 1901. This system has classified blood into different types, based on the red blood cells (erythrocytes) and the proteins on their surface. Of the various types of red blood cell antigens - the ABO and rhesus types are the most important. For all the information you require on blood groups and their newest subdivisions, our support group is where you will find it!
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