Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin, China. Department of Nuclear Medicine, West China Hospital of Sichuan University, Chengdu, Sichuan, China. Department of Nuclear Medicine, Hebei General Hospital, Shijiazhuang, Hebei, China. Department of Nuclear Medicine, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi, China. Department of Nuclear Medicine, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China. Department of Nuclear Medicine, Beijing Tongren Hospital, Capital Medical University, Beijing, China. Department of Nuclear Medicine, The People's Hospital of Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia, China. Department of Nuclear Medicine, Guangzhou Panyu Central Hospital, Guangzhou, China.