Exclusive breastfeeding in infants attending public health care units in the municipality of Joinville, State of Santa Catarina, Brazil - Franco, Selma Cristina; Nascimento, Maria Beatriz Reinert do; Reis, Marco Antonio Moura; Issler, Hugo; Grisi, Sandra Josefina Ferraz Ellero (Revista Brasileira de Saúde Materno Infantil, 2008)