20. Proteinuria at screening as demonstrated by either (1) urine protein:creatinine (UPC) ratio of >/= 1.0 or (2) urine dipstick for proteinuria >/= 2+ (patients discovered to have >/= 2+ proteinuria on dipstick urinalysis should undergo a 24 hour urine collection and must demonstrate </= 1g of protein in 24 hours to be eligible).