Moreira , P., Sousa , A.S., Guerra , R.S., Santos , A., Borges , N., Afonso , C., Amaral , T.F. and Padrão , P. 2018. Sodium and potassium urinary excretion and their ratio in the elderly: results from the Nutrition UP 65 study. Food & Nutrition Research. 62, (Feb. 2018). DOI:https://doi.org/10.29219/fnr.v62.1288.