0211-6995 0211-6995 S0211-69952017000600663 10.1016/j.nefro.2017.03.002 Venezuela España Venezuela Venezuela 00 12 2017 00 12 2017 37 6 663 665 2013 79 42-5 2014 44 506-11 2016 2014 81 289-96 2016 1994 8 328-32