process. As a result of this effort the imputation information increased from 0.939 to 0.999, and all results reported here were based on re-imputed data. On the basis of 1408 (original imputation) or 1441 individuals (re-imputation) with both typed and imputed genotypes the imputation accuracy for this variant as estimated by the correlation with typed genotypes changed from 0.946 (original imputation) to 0.997 (re-imputation).