1. Department of Surgery, Faculty of Medicine Diponegoro University, Dr. Kariadi General Hospital, Semarang, Jawa Tengah, Indonesia
2. Department of Biomedical Science, Faculty of Medicine Diponegoro University, Semarang, Jawa Tengah, Indonesia
3. Department of Histology, Faculty of Medicine Diponegoro University, Semarang, Jawa Tengah, Indonesia
4. Department of Anatomical Pathology, Faculty of Medicine Diponegoro University, Dr. Kariadi General Hospital, Semarang, Jawa Tengah, Indonesia