1. Geriatric Division, Department of Internal Medicine, Faculty of Medicine Universitas Indonesia/Dr Cipto Mangunkusumo Hospital, Jakarta, Indonesia
2. Department of Medical Physics, Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
3. Medical Technology Cluster, Indonesian Medical Education and Research Institute (IMERI), Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia
4. Faculty of Medicine Universitas Indonesia, Jakarta, Indonesia