Submitted for Publication: September 29, 2011; accepted November 4, 2011.
Financial Disclosure: None reported.
Funding/Support: We acknowledge the support of the EU-GEI study (project of the EUropean network of national schizophrenia networks studying Gene-Environment Interactions). The research leading to these results has received funding from the European Community's Seventh Framework Programme under grant agreement No. HEALTH-F2-2010-241909 (Project EU-GEI).
Additional Contributions: We thank all the contacted authors for their collaboration in clarifying potential overlaps between samples and providing additional information on the retrieved studies: Dorien Nieman, Nikie Korver-Nieberg, Lydia Krabbendam, Nina Seiferth, Seza Oezguerdal, Roland Berecz, Szabolcs Keri, Georg Juckel, Anke Brockhaus, Ralf Pukrop, Martin Hambrecht, Ingo Frommann, Katharina Pauly, Vijay Mittal, Tara Niendam, Cindy Yee-Bradbury, Jean Addington, Richard Keefe, Kristin Cadenhead, Stephan Ruhrmann, Larry Seidman, and Barbara Cornblatt.