1. Department of Endocrinology, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China
2. South China Center of Craniofacial Stem Cell Research, Guanghua School and Hospital of Stomatology, Sun Yat-sen University, Guangzhou, People's Republic of China
3. Research and Development Center for Tissue Engineering, School of Stomatology, Air Force Medical University, People's Republic of China
4. Department of Dermatology, Changhai Hospital, Second Military Medical University, Shanghai, People's Republic of China
5. Easter Greenland Hospital, People's Republic of China