Rico Januar Sitorus
(1), Feranita Utama
(2), Imelda G. Purba
(3), Bina Melvina
(4)
(1)
Public health faculty, university of Sriwijaya., Indonesia,
(2)
Universitas Sriwijaya, Indonesia,
(3)
Universitas Sriwijaya, Indonesia,
(4)
Universitas Sriwijaya, Indonesia