Intersection of http://www.ncbi.nlm.nih.gov/projects/SNP and http://www.ncbi.nlm.nih.gov/projects/SNP
This is the CodeSystem that contains codes in both Genetic Sequence polymorphism database (http://www.ncbi.nlm.nih.gov/projects/SNP) and Genetic Sequence polymorphism database (http://www.ncbi.nlm.nih.gov/projects/SNP).