1. Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, PR China.
2. Clinic of Dermatology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
3. HIV Clinic Praxis, Berlin, Germany.
4. Institute for HIV Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
5. Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.