2236-3459 2236-3459 S2236-34592013000100213 10.1590/S2236-34592013000100012 Spain 00 04 2013 00 04 2013 17 39 213 230

45 45 39-72 35 35 29-37 63 214 214 467-84 10 10 18-9 2 2 113-23 6 6 193-207 16 16 30-1