Pratama, E.; Rizqiansyah , C.; Firmansah , W.; Soenarti , S. The Impact of Administering Vitamin D Supplements on Handgrip Strength and Performance in the Timed-up-and-Go Test in Frail Elderly Individuals: A Meta-Analysis Involving Randomized Controlled Trials. Deka in Medicine 2024, 1, e774.