0871-9721 0871-9721 S0871-97212021000400273 10.32932/rpia.2021.12.072 Portugal Spain 30 12 2021 30 12 2021 29 4 273 277

1 1995 6 39-43 2 2007 143 290-5 3 2002 89 38-43 4 1986 7 511-9 5 1997 99 293-300 6 2019 19 229-35 7 2018 100 107-12 8 2013 1830 5375-81