Systolic blood pressure and 6-year mortality in South Africa: a country-wide, population-based cohort study oleh Alpha Oumar Diallo, MPH, Mohammed K Ali, MD, Pascal Geldsetzer, ScD, Emily W Gower, PhD, Trasias Mukama, MPH, Ryan G Wagner, PhD, Justine Davies, ProfMD, Maarten J Bijlsma, PhD, Nikkil Sudharsanan, PhD