1. Master of Hospital Administration, Postgraduate Program, Universitas Muhammadiyah Yogyakarta, Kasihan, Indonesia
2. Information Technology Department, Politeknik Negeri Padang, Padang, Indonesia
3. Medical Education Program, Faculty of Medicine, Universitas Muhammadiyah Semarang, Semarang, Indonesia
4. Department of Food Microbiology and Molecular Biology, National Institute of Nutrition, Hanoi, Vietnam