SPROTT, Kevin; LEWIS, Michael; CHOI, Hyeongwook; FANG, Frank; SHAN, Mingde; LAZAROVA, Tsvetelina, I; LI, Lin; SIDDIQUI, M., Arshad; LAROUCHE-GAUTHIER, Robin; LEMIRE, Alexandre Patent: WO2013/103993 A1, 2013