However, in many evaluations it is important to understand not only if an intervention worked (and to measure accurately any difference it made) but to understand why the intervention worked ? the principles or characteristics associated with success or failure, and the pathways through which effects are generated. http://www.viagrabelgiquefr.com/acheter-du-viagra-en-suisse http://www.viagrabelgiquefr.com/acheter-du-viagra-en-suisse-sans-ordonnance http://www.viagrabelgiquefr.com/acheter-du-viagra-en-thailande
書き込みはまだありません。