Blood type classification uses the ABO system. This system determines blood type based on the presence or absence of A and B ...

Blood types are determined by antigens -- a substance that triggers an immune response -- on the surface of red blood cells. There are ABO antigens, which designate ABO blood types. This is ...

Specifically, they found that patients with blood type A ... by which ABO subtypes or closely linked genetic variations influence the risk of pancreatic cancer, and to determine the biological ...