Delayed DiagnosisTime FactorsRisk FactorsSymptom AssessmentDepressionQuestionnairesSeverity of Illness IndexBehavioral SymptomsPsychiatric Status Rating ScalesTreatment OutcomeAffective SymptomsQuality of LifeProspective StudiesPrevalenceFollow-Up StudiesAnxietyDepressive DisorderCross-Sectional StudiesStress Disorders, Post-TraumaticFatigueLongitudinal StudiesAsthmaRespiration DisordersSchizophreniaStress, PsychologicalRetrospective StudiesCoughLower Urinary Tract SymptomsPainGastroesophageal RefluxSchizophrenic PsychologyPsychotic DisordersGastrointestinal DiseasesOccupational DiseasesPsychometricsUrination DisordersRespiratory Tract DiseasesComorbiditySex FactorsPsychophysiologic DisordersHeadacheRespiratory SoundsChronic DiseaseCohort StudiesAge Factors