Dear Editor,
Repetitive DNA sequences, particularly the tandem repeats, are known to modulate gene expression and cause structural or functional variability in genes (Usdin, 2008; Gemayel et al., 2010). In addition to single-nucleotide polymorphisms and copy number variations, tandem repeat polymorphisms are increasingly recognized as another major dynamic source of genetic variability in health and disease (Hannan, 2010).