aPediatrics, IWK-Grace Health Centre, Halifax,Nova Scotia,Canada
bPsychology, IWK-Grace Health Centre and Dalhousie University,Halifax, Nova Scotia,Canada
cAnesthesia, IWK-Grace Health Centre and Dalhousie University,Halifax, Nova Scotia,Canada
dNursing, IWK-Grace Health Centre and Dalhousie University,Halifax, Nova Scotia,Canada
*Corresponding author: Dr. G.A. Finley, Pediatrics, IWK-Grace Health Centre, 5850 University Ave, P.O. Box 3070, Halifax, Nova Scotia, Canada, B3J 3G9
Submitted May 10, 1995; revised April 18, 1996; accepted April 23, 1996.