Cited 12 times since 2015 (1.2 per year) source: EuropePMC International journal of cardiology, Volume 187, 28 4 2015, Pages 559-561 Heart rate variability, but not heart rate, is associated with handgrip strength and mortality in older Africans at very low cardiovascular risk: A population-based study. Koopman JJ, van Bodegom D, Maan AC, Li Z, Ziem JB, Westendorp RG, Jukema JW