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Ernst, Markus and Crawford, Rebecca J and Schelldorfer, Sarah and Rausch-Osthoff, Anne-Kathrin and Barbero, Marco and Kool, Jan and Bauer, Christoph M (2015) Extension and flexion in the upper cervical spine in neck pain patients. Manual therapy, 20 (4). pp. 547-52. ISSN 1532-2769