... of Psychiatry, University of California at San Diego, La Jolla, CA, USA.Authors’ contributionsXG conceived the study, gathered and managed the data, performed the genetic analysis, participated in the ... statistical analysis and wrote the paper.KNF conceived the study, carried out the literature search and analysis andparticipated in writing the paper. ZR participated in analysing the data andwriting ... andwriting the paper. AL participated in the genetic and statistical analysis. HSAparticipated in designing the study, analysing the data and writing the paper. GB participated in designing the study,...