Chanarin I, Knight S, O'Brien J, James D
Br J Haematol. 1976 Aug;33(4):539-41. doi: 10.1111/j.1365-2141.1976.tb03572.x.
There is a significant association with HL-A3 type and pernicious anaemia. In addition there is a negative association with HL-A2. There is no association between HL-A type and the presence or absence of immunity to intrinsic factor.