The study was reviewed and approved by the institutional review board (IRB) at each site or the central IRB and was conducted in accordance with Good Clinical Practice guidelines and the Declaration of Helsinki. All participants provided written informed consent before any study-related procedures were performed. The study was registered with Japan Pharmaceutical Information Center—Clinical Trials Information (JapicCTI identifier: 090694). A complete list of the study investigators is available in eAppendix 1 at PSYCHIATRIST.COM.