CPIC Get Alleles

Get pharmacogenomics alleles and their functional status for a gene from CPIC. Returns allele names, activity values, and functional status. Note: use 'clinicalfunctionalstatus' field for the active clinical classification (e.g., 'No function', 'Normal function'); the 'functionalstatus' field may be null for some genes. Critical for translating genotype to phenotype (e.g., CYP2D6 *4 = no function, CYP2D6 *1 = normal function).