Lynn M Breau1
, Patrick J McGrath2,3
, Bonnie Stevens4,5
, Joseph Beyene6,7
, Carol S Camfield2,3,8
, G Allen Finley1,2,9
, Linda Franck10
, Alexandra Howlett3
, Karel O'Brien7
and Arne Ohlsson7 
1Pediatric Pain Service, IWK Health Centre, 5850 University Ave., P.O. Box 9700, Halifax, Nova Scotia, B3K 6R8, Canada
2Department of Psychology, Dalhousie University, Life Sciences Centre, Halifax, Nova Scotia, B3H 4J1, Canada
3Department of Pediatrics, Dalhousie University, 5850 University Ave., P.O. Box 9700, Halifax, Nova Scotia, B3K 6R8, Canada
4Faculty of Nursing, University of Toronto, 50 St. George St., Toronto, Ontario, M5S 3H4, Canada
5The Hospital for Sick Children Centre for Nursing, Room 4734B Atrium Building, 555 University Avenue Toronto, Ontario, M5G 1X8, Canada
6Population Health Sciences, The Hospital for Sick Children, 123 Edward Street, Room 407, Toronto, Ontario, Canada
7Department of Pediatrics, Department of Paediatrics, Mt. Sinai Hospital, 600 University Avenue, Toronto, Ontario, M5G 1X5, Canada
8Division of Neurology, IWK Health Centre, 5850 University Ave., P.O. Box 9700, Halifax, Nova Scotia, B3K 6R8, Canada
9Department of Anesthesiology, Dalhousie University, 5850 University Ave., P.O. Box 9700, Halifax, Nova Scotia, B3K 6R8, Canada
10Centre for Nursing and Allied Health Professionals Research, Great Ormond Street Hospital for Children NHS Trust, Great Ormond Street, London WC1N 3JH, UK