1 Institute of Dermatology, Shaanxi Institution of Traditional Chinese Medicine, Xi'an, China.
2 Department of Dermatology, Shaanxi Traditional Chinese Medicine Hospital, Xi'an, China.
3 The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, China.
4 Center for Evidence Synthesis in Health, Brown University School of Public Health, Providence, Rhode Island, USA.
5 Department of Environmental Health, Boston University School of Public Health, Boston, Massachusetts, USA.