1688-4221 1688-4221 S1688-42212018000200231 10.22235/cp.v12i2.1687 Mexico Mexico Portugal México 00 11 2018 00 11 2018 12 2 231 237

1996 Second Edition 1961 4 561-71 1994 2001 81 2 2 322-31 2002 2nd ed. 2017 2017 22 1 1 103-9 2017 22 3 3 373-9 2018 39 1 1 104-15 2017 11 2 2 149-54 2018 12 1 1 42-51 1975 12 189-98 2017 13 1 1 59-71 2012 2 1 1 19-28 2011 56 7 7 408-17 2017 2017 2017 25 10 10 1123-34 2015 Cruz Roja Española 2014 5 1 1 177-86 2014 5 1 1 195-204 2014 1 2 2 187-96 2014 1 2 2 283-92 2011 19 4 4 313-6