Louise Brough1, Barbara M Thomson2, Sheila A Skeaff3. 1. 1School of Food and Nutrition,Massey Institute of Food and Technology,College of Health,Massey University,PO Box 11 222,Palmerston North 4442,New Zealand. 2. 2Red Tussock,9 The Rise,Christchurch 8081,New Zealand. 3. 3Department of Nutrition,University of Otago,PO Box 56,Dunedin,New Zealand.