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Jornal de Pediatria (Vers�o em Portugu�s) > 2017 > 93 > 2 > 148-155
Jornal de Pediatria > 2017 > 93 > 2 > 148-155
International Journal of Nursing Studies > 2009 > 46 > 1 > 77-85
Annals of Epidemiology > 1998 > 8 > 7 > 422-432