Risk score for first-screening of prevalent undiagnosed chronic kidney disease in Peru: the CRONICAS-CKD risk score. - Carrillo-Larco RM; Miranda JJ; Gilman RH; Medina-Lezama J; Chirinos-Pacheco JA; Muñoz-Retamozo PV; Smeeth L; Checkley W; Bernabe-Ortiz A (BMC nephrology, 2017)