1. Department of Special Education, Stockholm University, Stockholm, Sweden
2. CHILD, School of Health and Welfare, Jönköping University, Jönköping, Sweden
3. Frank Porter Graham Child Development Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
4. Graduate Institute of Early Intervention, College of Medicine, Chang-Gung University, Tao-Yuan City, Taiwan
5. Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Linkou, Tao-Yuan City, Taiwan