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Paediatrics and Child Health > 2014 > 24 > 8 > 337-342
European Journal of Cancer > 2007 > 43 > 2 > 391-401
Journal of Clinical Epidemiology > 1995 > 48 > 8 > 1069-1076
Paediatrics and Child Health > 2014 > 24 > 8 > 337-342
European Journal of Cancer > 2007 > 43 > 2 > 391-401
Journal of Clinical Epidemiology > 1995 > 48 > 8 > 1069-1076