1 Spinal Cord Injury Center, Heidelberg University Hospital, Heidelberg, Germany.
2 The Second Clinical Medical College of Guangzhou University of Chinese Medicine, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China.
3 Department of Rehabilitation, Huai'an Second People's Hospital, The Affiliated Huai'an Hospital of Xuzhou Medical University, Huai'an, China.
4 clinical medicine from Jiangsu University, Zhenjiang, China.
5 University of Sun Yat-sen University, Guangzhou, China.