Insurance, DisabilitySocial SecurityUnited States Social Security AdministrationDisabled PersonsDisability EvaluationPensionsEligibility DeterminationRehabilitation, VocationalReturn to WorkInsurance BenefitsEmploymentSick LeaveStress Disorders, Post-TraumaticIntellectual DisabilityDevelopmental DisabilitiesCombat DisordersActivities of Daily LivingLearning DisordersVeteransDisabled ChildrenMentally Disabled PersonsQuestionnairesSeverity of Illness IndexLife Change EventsWarTreatment OutcomeUnited StatesPain MeasurementPsychiatric Status Rating ScalesRisk FactorsQuality of LifePrevalenceMobility LimitationImplosive TherapyInternational Classification of Functioning, Disability and HealthChronic DiseaseVeterans Disability ClaimsComorbidityHealth StatusWounds and InjuriesIraq War, 2003-2011Prospective StudiesSeptember 11 Terrorist AttacksLow Back PainFollow-Up StudiesTime FactorsAfghan Campaign 2001-DepressionCross-Sectional StudiesAdaptation, PsychologicalMultiple SclerosisLongitudinal Studies