1. Department of Psychology, School of Education, Soochow University, Suzhou, China
2. Center for Prolonged Grief, Columbia School of Social Work, New York, New York, USA
3. Shanghai Key Laboratory of Mental Health and Psychological Crisis Intervention, School of Psychology and Cognitive Science, East China Normal University, Shanghai, China
4. Division of Psychopathology and Clinical Intervention, Department of Psychology, University of Zurich, Zurich, Switzerland
5. Center for psychological development, Tsinghua University, Beijing, China