Hameed, S., Almas, A., Ahmed, F. S., & Khan, A. H. (2021). Descriptive Controlled Study Regarding the Effects of Negative Chronotropic Agents on Lowering Heart Rate and Morning Surge in a Tertiary Care Hospital . National Journal of Health Sciences, 1(1), 25-29. Retrieved from https://ojs.njhsciences.com/index.php/njhs/article/view/153