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This article may be downloaded for personal use only. Permission to reproduce this article must be sought from New Zealand Society of Physiotherapists. This work was published in New Zealand Journal of Physiotherapy, 29(1): 6-14. 2001. More information about this journal can be found at http://www.physiotherapy.org.nz/Category?Action=View&Category_id=241
Copyright (2001) New Zealand Society of Physiotherapists.