BKPyV-	BK-polyomavirus strain
EM-	(transmission) electron microscopy
LM-	(standard) light microscopy
PCR-	(quantitative) polymerase chain reaction
PyV-	polyomavirus
Pvl-	histologic Banff score of intra renal polyomavirus load levels ranging from “0” (no PyV detected) to “3” (marked PyV load with >10% infected renal tubules)
PyVN-	polyomavirus nephropathy (biopsy proven definitive renal disease)
UNC	The University of North Carolina at Chapel Hill.