Paek, Chol-Hyok, Pyongyang Friendship Hospital, Pyongyang, Democratic People’s Republic of Korea. Paek, Ri-Hyang, Pyongyang University of Medical Sciences, Ryonhwa-dong, Central District, Pyongyang, Democratic People’s Republic of Korea. Paek, Ryong Nam , Department of Nephrology, Pyongyang University of Medicine, Pyongyang, Democratic People′s Republic of Korea. Paek, Sin Hyok, Department of Radiology, Faculty of Clinical Medicine, Pyongyang University of Medical Sciences, Democratic People’s Republic of Korea. Paek, Sinhyok , Department of Paediatrics, Pyongyang University of Medical Sciences, Central District, Pyongyang, Democratic People’s Republic of Korea. Paek, Sinhyok, Pyongyang Medical College, Taedonggang District, Pyongyang, Democratic People’s Republic of Korea. Paek, Sungil , Department of Clinical Laboratory, Kanggye Medical College, Kanggye City, Jagang province, Democratic People’s Republic of Korea. Pak, Chang-Hyok , Department of Dermatology, Hospital of Chongjin College of Medical Sciences, Chongjin, Democratic People’s Republic of Korea. Pak, Chang-Sok, Pyongyang Maternity Hospital, Pyongyang, Democratic People’s Republic of Korea. Pak, Chol Guk , Pyongyang University of Medical Sciences Pak, Hyo-Guk, Department of Gastroenterology, Korean Red Cross General Hospital, Democratic People’s Republic of Korea. Pak, Hyon, Department of Microsurgery and Plastic Surgery, Hyesan Medical College, Hyesan, Democratic People’s Republic of Korea. Pak, Kyong-Il , Department of Dermatology, Hospital of Chongjin College of Medical Sciences, Chongjin, Democratic People’s Republic of Korea. Pak, Myong Gn , Haeju College of Medical Sciences Pak, Sol-Ae, Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea. Pak, Song Bong, Department of Obstetrics, Pyongyang Maternity Hospital, Democratic People’s Republic of Korea. Pak, Song Suk, Department of Obstetrics, Pyongyang Maternity Hospital, Democratic People’s Republic of Korea. Pak, Su Il , Institute for Infection Control, Faculty of Hygiene, Pyongyang University of Medical Sciences, Democratic People’s Republic of Korea. Pak, Yong Chol, Institute of Medical Biology, Ministry for Medical Research, Ministry of Public Health. Democratic People’s Republic of Korea. Pak, Yong Guk, Pyongyang University of Medical Sciences Pak, Yong-Chol, Medical Biology Institute, Academy of Medical Science, Pyongyang, Democratic People’s Republic of Korea. Pak, Yun-Hui, Pyongyang Maternity Hospital, Pyongyang, Democratic People’s Republic of Korea. Pratama Umar, Tungki , Faculty of Medicine, Sriwijaya University, Palembang Pyon, Sun Gum , Department of General Internal Medicine. Hospital of Pyongyang University of Medical Sciences, Pyongyang, Democratic People’s Republic of Korea.