1. Department of Surgery, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia.
2. Department of Surgery, Faculty of Medicine, Universitas Padjadjaran, Hasan Sadikin General Hospital, Bandung, Indonesia.
3. Department of Surgery, Faculty of Medicine, Universitas Airlangga, Soetomo Hospital, Surabaya, Indonesia.
4. Department of Surgery, Faculty of Medicine, Universitas Gajah Mada, Sardjito General Hospital, Yogyakarta, Indonesia.
5. Department of Surgery, Faculty of Medicine, Universitas Sumatera Utara, Adam Malik General Hospital, Medan, Indonesia.
6. Department of Surgery, Fatmawati General Hospital, Jakarta, Indonesia.
7. Department of Clinical Pathology, Faculty of Medicine, Universitas Indonesia, Cipto Mangunkusumo General Hospital, Jakarta, Indonesia.
8. Department of Clinical Microbiology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.
9. Department of Community Medicine, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia.