1982-7806 1982-7806 S1982-78062017000300716 10.14393/che-v16n3-2017-10 Brazil Brazil Brazil 00 12 2017 00 12 2017 16 3 716 731

2 30 30 01-21 2 1 1 06-26 39 2 2 88-105 18 54 54 629-794 52 52 75-89