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DethBeard-
Yep, i've been donating for about 15 years and then one of the supervising nurses mentioned it to me a couple of months ago. It's either that they've only just worked out a financially viable or accurate method of testing for this particular sub-type, or that knowledge of it's uses in sickle cell anaemia has increased.
chief_scrutter
I'm O Rh Positive too. this Ro business is a further sub type.