Whiplash InjuriesNeck PainInsurance, AccidentAccidents, TrafficNeck MusclesCornell Medical IndexPainNeck InjuriesChronic PainSaskatchewanAccessory NerveHypesthesiaCervical VertebraePain MeasurementAccelerationLow Back PainAccessory Nerve DiseasesChronic DiseaseWounds and InjuriesVertigoPain ManagementPhysical Therapy ModalitiesHeadacheDisability EvaluationCraniocerebral TraumaBack PainTreatment OutcomePain ThresholdDizzinessFacial PainAnalgesics, OpioidBrain InjuriesChest PainPain, ReferredPain ClinicsPain, IntractableTime FactorsFollow-Up StudiesProspective Studies