| heterogeneity in the familial aggregation of fasting serum uric acid level in five north american populations: the lipid research clinics family study. | this study represents the first formal examination for heterogeneity in the familial aggregation of fasting serum uric acid (ua) levels. data from 5 clinics (cincinnati, stanford, iowa, minnesota, and oklahoma) participating in the lipid research clinics (lrc) family study, which included a total of 685 nuclear families (n = 2,146), were analyzed. heterogeneity among the clinics in familial resemblance was detected. however, this heterogeneity could not be attributed to differences in distributi ... | 1990 | 2368810 |