The data were organized in the SPSS program SPSS Incorporation, Chicago, United States, version 16.0; and analyzed through the STATA software Stata Corp LP, College Station, TX 77845, USA, version 11.0.
Los datos fueron organizados en el programa SPS SPS Inc., Chicago, Estados Unidos, versión 16.0; y analizados con el programa STATA Stata Corp LP, College Station, TX 77845, USA, versión 11.0.
Os dados foram organizados no programa SPSS SPSS Inc., Chicago, Estados Unidos, versão 16.0; e analisados com o software STATA Stata Corp LP, College Station, TX 77845, USA, versão 11.0.