Keumala, D., Zulkarnaini Tala, Z., Lestari, S., Hutagalung, S. V., Ganie, R. A., & Harum, D. S. (2017). ANALYSIS OF LIFESTYLE, KNOWLEDGE, ATTITUDE, AND KNOWLEDGE OF WOMEN AGED 20-50 YEARS OLD WITH VITAMIN D DEFICIENCY-INSUFFICIENCY IN NORTH SUMATERA, INDONESIA. Sumatera Medical Journal, 1(01), 1–7. https://doi.org/10.32734/sumej.v1i01.75