Suarjana, I.N., Isbagio, H., Soewondo, P., Rachman, I.A., Sadikin, M., Prihartono, J., Malik, S.G. and Soeroso, J. 2019. The Role of Serum Expression Levels of Microrna-21 on Bone Mineral Density in Hypostrogenic Postmenopausal Women with Osteoporosis: Study on Level of RANKL, OPG, TGFβ-1, Sclerostin, RANKL/OPG Ratio, and Physical Activity. Acta Medica Indonesiana. 51, 3 (Nov. 2019), 245.