Locked nucleic acid (LNA) mediated improvements in siRNA stability and functionality - Joacim Elmén; Håkan Thonberg; Karl Ljungberg; Miriam Frieden; Majken Westergaard; Yunhe Xu; Britta Wahren; Zicai Liang; Henrik Ørum; Troels Koch; Claes Wahlestedt (Nucleic Acids Research, 2005)