Pain MeasurementAcute PainPainPain ManagementPain, PostoperativePain ClinicsPain ThresholdChronic PainAnalgesicsAnalgesics, OpioidAnalgesiaPain, IntractablePain PerceptionAnesthesia Department, HospitalFacial PainAcute DiseaseLow Back PainHyperalgesiaBack PainNeuralgiaNeck PainAbdominal PainAnalgesics, Non-NarcoticAnalgesia, Patient-ControlledPelvic PainUnited States Department of DefenseNociceptorsMorphinePain, ReferredRecovery RoomChronic DiseaseReproducibility of ResultsToothacheAcupuncture