Gusdani Harahap, W, and A Nurwahyuni. “Factors Related to the Incidence of Hypertension Among Prospective Pilgrims in Medan, Indonesia During Embarkation Period 2016”. KnE Life Sciences, vol. 4, no. 10, Feb. 2019, pp. 261–268, doi:10.18502/kls.v4i10.3728.