Correction

Since the publication of our article (Rizzi et al, Genet Sel Evol, 2012, 44:21), it has come to our attention that our text inadvertently includes some statements taken from the introductory section of the following paper by Pääbo et al. without citation:

Pääbo S, Poinar H, Serre D, Jaenicke-Despres V, Hebler J, Rohland N, Kuch M, Krause J, Vigilant L, Hofreiter M: Genetic analyses from ancient DNA. Annu Rev Genet 2004, 38:645–679.

We apologise for this oversight and any inconvenience this may have caused.