| Affiliation: | 1. Department of Dermatology, Fu Xing Hospital of Capital Medical University, Beijing, China;2. Department of Obstetrics and Gynecology, Fu Xing Hospital of Capital Medical University, Beijing, China;3. Department of Physical Examination, Primary and Middle School Health Care Institute of Xuan wu District, Beijing, China;4. Department of Ultrasonography, Fu Xing Hospital of Capital Medical University, Beijing, China;5. Department of Dermatology, Xuan Wu Hospital Capital Medical University, Beijing, China |
