Saing, Johannes, Ridwan Daulay, Rafita Ramayati, and Rusdidjas Rusdidjas. 2016. “Comparison of Blood Pressure of Senior High School Students in the Inner and Outer City of Medan”. Paediatrica Indonesiana 47 (6), 247-51. https://doi.org/10.14238/pi47.6.2007.247-51.