Experimental study of chronic renal tubular-interstitial injuryinduced by Radix Aristolochiae Fangchi extract in rats HPLC Determination of aristolochic acids in plants of Aris tolochiaL by static pressurized liquid extraction Pharmacokinetics of aristolochie acid A in Radix Aristolochiae and Guanxinsuhe Capsule Hepatic and renal injury induced by Radix Aristolochiae or Guanxin Suhe Wan for a long term in rats Experimental study of chronic renal tubular-interstitial injury induced by Radix Aristolochiae Fangchi extract in rats Study on transdifferentiation of renal tubular cells in rat chronic renal interstitial fibrosis induced by Radix Aristolochiae Fangchi extract