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Wilroy J, Turner L, Birch D, Leaver-Dunn D, Hibberd E, Leeper J.Wilroy J, et al.Disabil Health J. 2018 Jan;11(1):62-69. doi: 10.1016/j.dhjo.2017.03.010. Epub 2017 Mar 23.Disabil Health J. 2018.PMID: 28359637
Birch DA, O'Toole TP, Kanu AJ.Birch DA, et al.J Am Coll Health. 1997 Nov;46(3):139-43. doi: 10.1080/07448489709595600.J Am Coll Health. 1997.PMID: 9394092