Correction to: The Pharmacogenomics Journal advance online publication 1 September 2009; doi:10.1038/tpj.2009.37

In this article, the name of the author MN Santos should have appeared as M Nobre-dos-Santos.

The authors of this article have noted that in Material and methods the phrase: ‘A fragment of 202 bp of the CA6 gene exon 3 was also PCR amplified with primers 5′-GGA GGT CAG GTG GAG CAG AG -3′ (forward); 5′-GCC CTG TCC ATC GAG GAC GC –3′ (reverse)’ should read ‘A fragment of 202 bp of the CA6 gene exon 3 was also PCR amplified with primers 5′-CAGGTGGGAGGTGAGCAGAG-3′(forward); 5′-CCGCTGATCTCCGAGGACGC-3′ (reverse).’