1. Department of Training and Social Relationship, National Ophthalmological Hospital, Hanoi, Vietnam.
2. Inventive Medical Foundation, South El Monte, California, USA.
3. Thai Minh Pharmaceutical, Hanoi, Vietnam.
4. Western University of Health Sciences, Pomona, California, USA.
5. Department of Surgery, Keck School of Medicine University of Southern California, Los Angeles, California, USA.
6. Department of Oncology, National Children Hospital, Hanoi, Vietnam.