Six different serum group systems (Bf, C3, Gc, Hp, Pi and Tf) were studied in a series of patients from northern Sweden with abdominal aortic aneurysms. In the haptoglobin system an increased frequency of the Hp 2-1 type was observed among the patients. No association was found between abdominal aortic aneurysms and the other five serum group systems.
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rd et al. (1984) studied this question.