Tarigan, A. P., R. . Firdaus, P. . Pandia, A. . Pradana, M. . Abdullah, S. P. Sinaga, W. . Wijanarko, B. . Triwahyudi, Y. . Vera, M. Maryaningsih, P. C. Eyanoer, and A. S. . Listyoko. “Effectiveness of Upper Arm and Breathing Exercises to Improve Inflammatory Markers in Severe COVID-19 Patients”. Narra J, vol. 4, no. 1, Jan. 2024, p. e417, doi:10.52225/narra.v4i1.417.