You will discover 3 SNP tracks accessible for the GRCh37/hg19 assembly. One is often a monitor that contains all mappings of reference SNPs for the human assembly, labeled "All SNPs (141)". The other two tracks are subsets of the monitor and exhibit appealing and simply outlined subsets of dbSNP: http://jeffreyuyqjq.blogerus.com/3525684/stata-homework-help-an-overview