The VISN 19 MIRECC is involved in research concerned with suicide prevention in high risk populations (e.g., history of traumatic brain injury, post-traumatic stress disorder); Recruitment for future studies will continue with a similar focus. The aim of this protocol is for the VISN 19 MIRECC Research Database (V19-MRD), to have a data repository of participants for possible recruitment from other studies being conducted at the VISN 19 MIRECC. The VISN 19 MIRECC conducts numerous research projects under the review of COMIRB and the VA R&D.