1. Department of Special Education, Stockholm University, Stockholm, Sweden
2. CHILD, School of Health and Welfare, Jönköping University, Jönköping, Sweden
3. Graduate Institute of Early Intervention, College of Medicine, Chang-Gung University, Tao-Yuan City, Taiwan
4. Department of Physical Medicine and Rehabilitation, Chang Gung Memorial Hospital, Linkou, Kwei-Shan, Tao-Yuan City, Taiwan