MDR1, the blood–brain barrier transporter, is associated with Parkinson's disease in ethnic Chinese. Issue 5 (30th April 2004) - Lee, C G L; Tang, K; Cheung, Y B; Wong, L P; Tan, C; Shen, H; Zhao, Y; Pavanni, R; Lee, E J D; Wong, M-C; Chong, S S; Tan, E K