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    Terwee CB, Mokkink LB, Knol DL, Ostelo RW, Bouter LM, de Vet HC. Rating the methodological quality in systematic reviews of studies on measurement properties: a scoring system for the COSMIN checklist. Qual Life Res 2012; 21: 6517.
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    Mitchell LE, Ziviani J, Oftedal S, Boyd RN. A systematic review of the clinimetric properties of measures of habitual physical activity in primary school aged children with cerebral palsy. Res Dev Disabil 2013; 34: 24192432.
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    Maher C, Kenyon A, McEvoy M, Sprod J. The reliability and validity of a research-grade pedometer for children and adolescents with cerebral palsy. Dev Med Child Neurol 2013; 55: 827832.
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    Clanchy KM, Tweedy SM, Boyd RN, Trost SG. Validity of accelerometry in ambulatory children and adolescents with cerebral palsy. Eur J Appl Physiol 2011; 111: 29519.
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    Trost SG, Wong WK, Pfeiffer KA, Zheng Y. Artificial neural networks to predict activity type and energy expenditure in youth. Med Sci Sports Exerc 2012; 44: 18019.