{Reference Type}: Randomized Controlled Trial {Title}: Combined therapy with estrogen and etidronate has an additive effect on bone mineral density in the hip and vertebrae: Four-year randomized study. {Author}: Wimalawansa SJ; {Journal}: Am J Med {Volume}: 137 {Issue}: 7 {Year}: 2024 Jul 22 {Factor}: 5.928 {DOI}: 10.1016/j.amjmed.2024.03.008