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[Physical activity practice among Brazilian adolescents].
Hallal PC, Knuth AG, Cruz DK, Mendes MI, Malta DC. Hallal PC, et al. Among authors: cruz dk. Cien Saude Colet. 2010 Oct;15 Suppl 2:3035-42. doi: 10.1590/s1413-81232010000800008. Cien Saude Colet. 2010. PMID: 21049144 Free article. Portuguese.