0123-5931 0123-5931 S0123-59312020000200097 10.15446/lthc.v22n2.86087 Argentina 00 12 2020 00 12 2020 22 2 97 125

2008 2013 2009 1026 1026 2007 1982 2012 9 9 154-64 2011 113 113 87-100 2009 2009 2009 2004 492 492 1993 2008 1965 1970 2006 1981 1971