Prospective outcome of rapid eye movement sleep behaviour disorder: psychiatric disorders as a potential early marker of Parkinson's disease. Issue 4 (16th January 2012) - Wing, Yun Kwok; Li, Shirley Xin; Mok, Vincent; Lam, Siu Ping; Tsoh, Joshua; Chan, Anne; Yu, Mandy Wai Man; Lau, Christine Y K; Zhang, Jihui; Ho, Crover Kwok Wah