1. Cutaneous Biology Research Center, Massachusetts General Hospital, Harvard Medical School , Boston, MA 02129, USA
2. Department of Computer Science, City University of Hong Kong, Kowloog Tong 999077, Hong Kong SAR
3. Molecular Pathology Unit, Center for Cancer Research, Massachusetts General Hospital, Department of Pathology, Harvard Medical School , Boston, MA 02129, USA
4. Department of Computer Science, The University of Hong Kong , Pokfulam 999077, Hong Kong SAR
5. Shenzhen Research Institute, City University of Hong Kong , Shenzhen 518057, China