1. Faculty of Medicine, University of Lisbon, Instituto de Medicina Molecular; Laboratory of Clinical Pharmacology and Therapeutics; Avenida Professor Egas Moniz Lisboa Portugal 1649-028
2. Santa Maria Hospital; Department of Pediatrics; Avenida Professor Egas Moniz Lisboa Lisboa Portugal 1649-028
3. University of Alberta; Department of Pediatrics; 9428 Aberhart Centre One 11402 University Avenue Edmonton Alberta Canada T6G 2J3
4. University of Alberta; Alberta Research Centre for Child Health Evidence; Aberhart Centre One, Room 9420 11402 University Ave. Edmonton Alberta Canada T6G 2J3
5. University of Ottawa; Departments of Pediatrics and Emergency Medicine; Ottawa Ontario Canada
6. The Montreal Children's Hospital; Department of Pediatrics; McGill University Health Centre 2300 Tupper Street, Room A216 Montreal Quebec Canada H3H 1P3
7. Faculty of Medicine, University of Calgary, Alberta Children's Hospital; Department of Pediatrics; 2888 Shaganappi Trail NW Calgary Alberta Canada T3B 6A8
8. Manitoba Institute of Child Health; 513-715 McDermot Avenue Winnipeg Manitoba Canada MB R3E 3P4