No you do not need to know it, I think it is more for research. I just put it in my profile for the fun of it since the question was there.
Here is a thread about blood types from MHarris who is the Owner I think and researcher
No you do not need to know it, I think it is more for research. I just put it in my profile for the fun of it since the question was there.
Here is a thread about blood types from MHarris who is the Owner I think and researcher