Conditioned medium from cultured mesenchymal stem cells: a potential for repairing multiple diseases and injuries 
Qiu Jiling, Wang Xiaotong, Zhou Haowen, Yang Pishan, Song Aimei
Chinese Journal of Tissue Engineering Research . 2019, (29): 4743 -4748 .  DOI: 10.3969/j.issn.2095-4344.1797