Utilization and expenses in conventional drugs vs traditional in ecuador: differences between the population of the four natural regions: coast, sierra, amazonia and insular region. enfermeria [Internet]. 2018 Dec. 29 [cited 2025 Dec. 18];(7):45-53. Available from: https://www.revistasdigitalesupeceduec35.biteca.online/index.php/enfermeria/article/view/152