1. Key Laboratory of Biomedical Information Engineering of Ministry of Education, Institute of Biomedical Photonics and Sensing, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China
2. School of Food Equipment Engineering and Science, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China
3. Department of Dermatology, The Second Hospital Affiliated to Xi’an Jiaotong University, Xi’an, Shaanxi 710049, PR China