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Gabel, Charles Philip; Melloh, Markus; Cuesta-Vargas, Antonio I (2011). Factor Structure of the Neck Disability Index. Spine, 36(21), p. 1815. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/BRS.0b013e31822c0521
Melloh, Markus; Gabel, Charles Philip; Cuesta-Vargas, Antonio I (2011). Factor analysis findings for the QuickDASH. Re: Mehta S, MacDermid JC, Carlesso LC, et al. Concurrent validation of the DASH and the QuickDASH in comparison to neck-specific scales in patients with neck pain. Spine, 36(15), p. 1260. Hagerstown, Md.: Lippincott Williams & Wilkins 10.1097/BRS.0b013e31821bbd7c
