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The trial was approved by the RMIT University Human Research Ethics Committee. Application (2003/70) was filed with the Clinical Trials Branch under its Clinical Trial Notification Scheme, Therapeutic Goods Administration (TGA), Department for Health and Ageing, Canberra, Australia. This clinical trial also has been registered with Australian and New Zealand Clinical Trial Registry (ACTRN12612000209897).
The study was conducted from September to December 2003 during the pollen season in Melbourne, Australia. Daily pollen counts were provided by School of Botany, University of Melbourne. There were two clinical sites for this trial, at the City Campus and Bundoora Campus of RMIT University.