Uganda / Adolescent / Humans / Selenium / Female / Blood sampling / Male / Statistical Significance / Young Adult / Atomic Absorption Spectrometry / Clinical Sciences / Aged / Middle Aged / Adult / Sub Saharan Africa / Case Control Study / Case Control Studies / Blood sampling / Male / Statistical Significance / Young Adult / Atomic Absorption Spectrometry / Clinical Sciences / Aged / Middle Aged / Adult / Sub Saharan Africa / Case Control Study / Case Control Studies