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anatomy athletic training critically injured athete cervical spine injuries injured athlete general anatomy physical examination thorax healthcare joints muscles sudden cardiac death health angina head injury physiotherapy spine vertebral column medical rescue breathing oxygen therapy airway obstruction oxygen saturation fbao airway management airway emergency notary public care administration of emergency care emergency care temporomandibular joint tmj face blood supply sympathetic trunk cervical spine anatomy cervical vertebrae thoracic cage thoraic wall thoracic wall intercostal muscles cartilage bone integument derma skin strain sprain fractures orthopedic injuries thunderstorm earth light environment medical devices