1. School of Sociology, Huazhong University of Science and Technology, Wuhan, China
2. Graduate School of Social Work, University of Denver, Denver, Colorado, USA
3. School of Social Work, Michigan State University, East Lansing, Michigan, USA
4. Department of internal medicine, Huazhong University of Science and Technology Hospital, Wuhan, Hubei, China
5. University Library, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA