Musculoskeletal DiseasesMusculoskeletal SystemRheumatic DiseasesOccupational DiseasesMusculoskeletal PainFibromyalgiaWork Capacity EvaluationRepublic of KoreaOsteoarthritisSick LeaveBack PainOsteoporosisPrevalenceFinlandArthritis, RheumatoidLong-Term CareCross-Sectional StudiesQuestionnairesRisk FactorsMusculoskeletal DevelopmentHuman EngineeringMusculoskeletal Physiological PhenomenaMusculoskeletal AbnormalitiesCumulative Trauma DisordersMusculoskeletal Physiological ProcessesComputer TerminalsMuscle NeoplasmsNeck PainPainShoulder PainCost of IllnessRheumatologyWorkloadOccupational HealthUpper ExtremityPain Measurement