Increased Plasma Exposures of Five Protoberberine Alkaloids from Coptidis Rhizoma in Streptozotocin-Induced Diabetic Rats: Is P‐GP Involved? - Yu, Sen; Yu, Yunli; Liu, Li; Wang, Xinting; Lu, Shousi; Liang, Yan; Liu, Xiaodong; Xie, Lin; Wang, Guangji (Planta Medica, 2010)