Hi Cynthia and Xia. Thank you for your messages. I prepared a dummy data copied it below. I also tried Xia's suggestion but it didn't work. Waiting for your suggestions. Thank you, Regards, Murat data rawdata; infile datalines delimiter=','; input random_no sequence $ gender $ ethnic_group $ age height weight BMI BSA; datalines; 1,R/T,Male,Caucasian,21,172.6,71.1,23.8,1.8 2,R/T,Male,Caucasian,23,177.8,72.1,22.7,1.9 3,R/T,Male,Caucasian,21,171.9,67.5,22.8,1.8 4,T/R,Male,Caucasian,19,173.9,74.2,24.5,1.9 5,R/T,Male,Caucasian,19,171.3,55.3,18.8,1.6 6,T/R,Male,Caucasian,23,180.1,84.6,26,2 7,T/R,Male,Caucasian,21,180.8,85.9,26.2,2.1 8,T/R,Male,Caucasian,23,177.9,94.9,29.9,2.1 9,R/T,Male,Caucasian,22,174.4,57.2,18.8,1.7 10,T/R,Male,Caucasian,22,174.3,55.5,18.2,1.7 ;
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