 The Trauma Service at OHSU keeps a state-mandated registry of all patients admitted to the Trauma Service that can be searched by injury diagnosis code. Demographic, injury, and hospital outcome data can be easily obtained and matched. Consenting subjects who were treated at OHSU between January 1, 2001 and September 20, 2008 will be contacted by mail and asked to participate in this study. Potential subjects who are currently 18 years of age can be included in the study if a Child Assent Form has been completed and a legally authorized representative LAR provides consent for study participation. . Investigators will be available to answer any questions that subjects may have concerning the study. 