2238-0094 2238-0094 S2238-00942016000300268 10.4025/rbhe.v16i3.785 Chile Colombia 00 07 2016 00 07 2016 16 3 268 302

22 241-58 2 3 3 25-32 29 223-39 6 10 10 91-110 25 27-36