K. El Essi, J. M. El-Shafie, Z. Al Hawamdah, and S. I. Zaqout, “Shoulder Pain among Rehabilitated Spinal Cord Injured Persons Using Manually Propelled Wheelchairs in the Gaza Strip: A Survey”, DCIDJ, vol. 23, no. 2, pp. 53–71, Aug. 2012.