Erratum to: J Hum Genet (2007) 52:1011–1017 DOI 10.1007/s10038-007-0208-4

The complete affiliations of two authors appeared incorrectly. The affiliations of A. Selicorni and D. Milani should be given as:

Department of Pediatrics, IRCCS Fondazione Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena, Milan, Italy.