Prodyanatasari A, Purnadianti M, Putri MP. Comparative Study of Hemoglobin Levels: Adolescents in The Highlands and Lowlands of Blitar Regency, East Java. BJi [Internet]. 2025 Oct. 3 [cited 2025 Oct. 15];11(3):160-5. Available from: https://bji-fk.ejournal.unsri.ac.id/index.php/bji/article/view/234