1. Faculty of Medicine and Post Graduate Programme, YARSI University, Jakarta, West Java, Indonesia
2. Palabuhanratu Hospital, Sukabumi, West Java, Indonesia
3. COVID Emergency Hospital, Kemayoran, Jakarta, West Java, Indonesia
4. Department of Clinical Pathology, Faculty of Medicine Padjadjaran University, Dr. Hasan Sadikin General Hospital, Bandung, West Java, Indonesia
5. Department of Clinical Pathology, Faculty of Medicine Airlangga University, Dr. Soetomo General Hospital, Surabaya, East Java, Indonesia
6. Cengkareng Hospital, Jakarta, West Jakarta, Indonesia
7. West Java Provincial Health Laboratory, Bandung, West Java, Indonesia