1. Life Sciences Institute, Yinfeng Biological Group, Ltd., Jinan , Shandong Province , People’s Republic of China
2. Yinfeng Biological Group, Ltd., Jinan , Shandong Province , People’s Republic of China
3. Guangxi Yinfeng Stem Cell Engineering Technology Co., Ltd. , Yufeng, Liuzhou, Guangxi Province , People’s Republic of China
4. Department of Otolaryngology Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University , Jinan , People’s Republic of China