The upper values of plasma creatine kinase of professional soccer players during the Brazilian National Championship - Lazarim, F L; Antunes-Neto, J M; da Silva, F O; Nunes, L A; Bassini-Cameron, A; Cameron, L C; Alves, A A; Brenzikofer, R; de Macedo, D V (J Sci Med Sport, 2009)