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Geyh S, Peter C, Müller R, Bickenbach JE, Kostanjsek N, Ustün BT, Stucki G, Cieza A. The Personal Factors of the International Classification of Functioning, Disability and Health in the literature — a systematic review and content analysis // Disabil Rehabil. — 2011. — 33 (13—14). — P. 1089—1102. — doi:10.3109/09638288.2010.523104. — PMID 20925452.