I would like to use Morisky scale to measure adherence and compare the result with therapeutic drug monitoring .There is a validated Arabic version of morisky scale so if I get the copyrights from prof. Morisky should I
1. conduct pilot study ?what is the sample
2. conduct Construct validity
3. test-retest reliability
4. Known group validity
5. Sensitivity and specificity
And after that I compare with therapeutic drug monitoring or no
thank you