1. Neck pain and related disability in helicopter pilots: a survey of prevalence and risk factors;Ang;Aviat Space Environ Med,2006
2. Neck strength and myoelectric fatigue in fighter and helicopter pilots with a history of neck pain;Ang;Aviat Space Environ Med,2005
3. Reliability of the visual analog scale for measurement of acute pain;Bijur;Acad Emerg Med,2001
4. Psychophysical bases of perceived exertion;Borg;Med Sci Sports Exerc,1982
5. Task and postural factors are related to back pain in helicopter pilots;Bridger;Aviat Space Environ Med,2002