data analysis was carried out using the Statistical Package for the Social Sciences (SPSS 21.0; SPSS IBM, New York, NY). 
SPSS
data analysis was carried out using the Statistical Package for the Social Sciences (SPSS 21.0; SPSS IBM, New York, NY). 
SPSS IBM
data analysis was carried out using the Statistical Package for the Social Sciences (SPSS 21.0; SPSS IBM, New York, NY). 
SPSS 21.0