Citation
Silva, Luis Carlos,Orduñez, Pedro,Rodriguez, Maria Paz,Robles, Silvia (2001) A tool for assessing the usefulness of prevalence studies done for surveillance purposes: the example of hypertension. Rev Panam Salud Publica;10(3) 152-160,sept. 2001. Retrieved from http://www.scielosp.org/scielo.php?script=sci_arttext&pid=S1020-49892001000900002&lng=en&nrm=iso&tlng=en