The G41D mutation in the superoxide dismutase 1 gene is associated with slow motor neuron progression and mild cognitive impairment in a Chinese family with amyotrophic lateral sclerosis. Issue 7 (10th June 2015) - Niu, Qi; Yi, Yongxiang; Sun, Xueping; Li, Tiannv; Zhang, Bingfeng; Chen, Hong; Wang, Xingxia; Xu, Qingchen; Shi, Mingchao; Jin, Qingwen