Can neurological soft signs and neurocognitive deficits serve as a combined endophenotype for Han Chinese with bipolar disorder? oleh Yingying Feng, Jia Song, Guorong Lin, Hong Qian, Li Feng, Zongqin Wang, Juan Wen, Chengchen Wang, Jiayuan Wang, Peifu Li, Zuohui Gao, Xiaoli Wang, Xiaohua Hu