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Purcell LK, Leblanc CM; Canadian Paediatric Society, Healthy Active Living and Sports Medicine Committee, and American Academy of Pediatrics, Council on Sports Medicine and Fitness.Purcell LK, et al.Paediatr Child Health. 2012 Jan;17(1):39-40. doi: 10.1093/pch/17.1.39.Paediatr Child Health. 2012.PMID: 23277756Free PMC article.
Purcell LK; Canadian Paediatric Society, Healthy Active Living and Sports Medicine Committee.Purcell LK, et al.Paediatr Child Health. 2012 Jan;17(1):31-4. doi: 10.1093/pch/17.1.31.Paediatr Child Health. 2012.PMID: 23277754Free PMC article.