EGFR and Hypertension: RCT - randomized controlled trial, m - month, CRF - chronic renal failure, CKD - chronic kidney disease, HTN - hypertension, CRD - chronic renal disease, L.CCB - L-type calcium channel blocker, SBP - systolic blood pressure, DBP - diastolic blood pressure, S creatinine - serum creatinine, U protein - urinary protein, GFR - glomerular filtration rate, ADR - adverse drug reaction, EGFR - estimated glomerular filtration rate, UPCR - urinary protein creatinine ratio, U.