In this article, the authors have added two additional authors, Todd Lencz and Anil K Malhotra, and have changed the order of the names as follows: Panos Roussos, Pavel Katsel, Kenneth L Davis, Stella G Giakoumaki, Todd Lencz, Anil K Malhotra, Larry J Siever, Panos Bitsios and Vahram Haroutunian Department of Psychiatry, The Mount Sinai School of Medicine, New York, NY, USA JJ Peters VA Medical Center, Bronx, NY, USA Faculty of Medicine, Department of Psychiatry and Behavioral Sciences, University of Crete, Heraklion, Crete, Greece Department of Psychology, University of Crete, Rethymno, Greece Division of Psychiatry Research, The Zucker Hillside Hospital, Glen Oaks, NY, USA Feinstein Institute for Medical Research, Manhasset, NY, USA Neuropsychopharmacology (2013) 38, 699