Diagnostic Performance of a Saliva Urea Nitrogen Dipstick to Detect Kidney Disease in Malawi oleh Rhys Evans, Viviane Calice-Silva, Jochen G. Raimann, Ulla Hemmila, Alison Craik, Mwayi Mtekateka, Fergus Hamilton, Zuze Kawale, Hamish Dobbie, Gavin Dreyer, Nathan Levin, Peter Kotanko, Roberto Pecoits-Filho