1405-5546 1405-5546 S1405-55462019000401517 10.13053/cys-23-4-2831 Chile Chile 00 12 2019 00 12 2019 23 4 1517 1521

1 2010 5 5 5 799-812 2 2009 18 4 4 1373-9 3 2010 19 1 1 67-78 4 1992 849-81 5 2009 17 1 1 120-9 6 2007 7 1999 142 142 8 2003 7 23-88 9 2001 492-9 10 2009 57 7 7 2840-6 11 2003 527-56