PLA2R1 and membranous glomerulonephritis: {TITLE-ABS-KEY(("membranous nephropathy" OR "membranous glomerulonephritis" OR "membranous glomerulopathy") AND ("phospholipase A2 receptor" OR "anti-PLA2R" OR "PLA2R antibody") AND ("diagnostic accuracy" OR "sensitivity" OR "specificity" OR "predictive value"))}.