1. Faculty of Medicine, Graduate Program of Medical and Health Science, Universitas Gadjah Mada, Yogyakarta, Indonesia
2. Faculty of Medicine, Department of Microbiology, Universitas Gadjah Mada, Yogyakarta, Indonesia
3. Faculty of Medicine, Department of Histology and Cell Biology, Universitas Gadjah Mada, Universitas Gadjah Mada, Yogyakarta, Indonesia