Musculoskeletal DiseasesRheumatic DiseasesRheumatic FeverRheumatic Heart DiseaseMusculoskeletal SystemOccupational DiseasesMusculoskeletal PainFibromyalgiaWork Capacity EvaluationOsteoarthritisRepublic of KoreaSick LeaveBack PainOsteoporosisArthritis, RheumatoidPrevalenceFinlandLong-Term CareCross-Sectional StudiesQuestionnairesRisk FactorsMusculoskeletal DevelopmentHuman EngineeringMusculoskeletal Physiological PhenomenaMusculoskeletal AbnormalitiesCumulative Trauma DisordersRheumatologyMusculoskeletal Physiological ProcessesComputer TerminalsRheumatic NodulePainMuscle NeoplasmsNeck PainChoreaArthritisShoulder PainMitral Valve StenosisPain MeasurementStreptococcus pyogenesAntistreptolysinMuscular DiseasesOccupational HealthUpper ExtremityWorkloadHeart Valve Diseases