1. Ray Fleming O of C and PL. Questions and answers about shoulder problems. Available at: http://www.niams.nih.gov/health_info/shoulder_problems/ (accessed April 28, 2013).
2. Screening for Medical Problems in Patients with Upper Extremity Signs and Symptoms
3. Bellamy J. Vision 2020. Available at: http://www.apta.org/Vision2020/ (accessed May 17, 2013).
4. Referred pain from somatic and visceral structures
5. Association APT. Guide to physical therapist practice, Rev 2nd edn. Revised Second. American Physical Therapy Association; 2003.