<<Disclaimer: Verify this information before applying it to your situation.>>

I will summarize the responses to my question on blood types. The
distribution of types in the United states are 45% O, 41% A, 10% B, 4% AB and
85% Rh+ (1997 Raintree Steck-Vaughn). I received 77 responses with 62
responses including Rh factor. Those received with Celiac Disease were 57% O,
29% A, 10% B, 4% AB and 63% Rh+ (of 62 responses). The major surprise was
that it was front end loaded with A type responses (The A people responded
more quickly than the others.)  I will now have to think about the
possibility of blood type making a difference on personality.

Granted, this was a small sample and responses were voluntary. However, there
is a strong indication that more O types and fewer A type have Celiac Disease
than in the normal distribution. Thanks for your responses.