| Affiliation: | (1) Department of Mathematics and Statistics, University of Victoria, PO Box 3045, Stn CSC, Victoria, BC V8W 3P4, Canada;(2) Down Syndrome Research Foundation, 1409 Sperling Avenue, Burnaby, BC V5B 4J8, Canada;(3) Centre for Human Movement Analysis, Queen Alexandra Foundation for Children, 2400 Arbutus Road, Victoria, BC V8 N 1V7, Canada |
