I'm actually going to make a software for blood donation, where I need to put a dropdown list of blood types what people actually have. So I choose to do this with:
[ Select Blood Group V ] [ O Negative ] [ O Positive ] [ A Negative ] [ A Positive ] [ B Negative ] [ B Positive ] [ AB Negative ] [ AB Positive ]
But that forum thread confuses me.
So I'm asking the biologists for a global and holistic answer to make a donor list with global blood types.