New cytochrome P450 2D6*56 allele identified by genotype/phenotype analysis of cryopreserved human hepatocytes.
Li L, Pan RM, Porter TD, Jensen NS, Silber P, Russo G, Tine JA, Heim J, Ring B, Wedlund PJ. Drug Metab Dispos. 2006 Aug; 34(8):1411-6. Epub 2006 May 5.