Ondansetron With/Out Dexamethasone to Prevent Vomiting in Patients Receiving Radiation to the Upper Abdomen

Cross Cancer Institute, Edmonton

British Columbia Cancer Agency - Centre for the Southern Interior, Kelowna

Fraser Valley Cancer Centre at British Columbia Cancer Agency, Surrey

British Columbia Cancer Agency, Vancouver

Nova Scotia Cancer Centre, Halifax

Cancer Care Ontario-London Regional Cancer Centre, London

Northwestern Ontario Regional Cancer Care, Thunder Bay

Toronto Sunnybrook Regional Cancer Centre, Toronto

Princess Margaret Hospital, Toronto

CHUS-Hopital Fleurimont, Fleurimont

Maisonneuve-Rosemont Hospital, Montreal

McGill University, Montreal

Centre Hospitalier de l'Universite de Montreal, Montreal

Centre Hospitalier Universitaire de Quebec, Québec