1. Graduate School, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea
2. Department of Molecular Biology, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea
3. Department of Pathophysiology, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea
4. Department of Clinical Pharmacology, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea
5. Faculty of Life Science, Kim Il Sung University, Pyongyang, Democratic People’s Republic of Korea