1. Department of Osteoarthropathy and Sports Medicine, Guangzhou Panyu Central Hospital, Guangzhou, Guangdong 511400, P.R. China
2. Translational Research Centre of Regenerative Medicine and 3D Printing of Guangzhou Medical University, Guangdong Province Engineering Research Center for Biomedical Engineering, State Key Laboratory of Respiratory Disease, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510150, P.R. China