1. Universitas Indonesia,Faculty of Mathematics and Natural Sciences,Department of Mathematics,Depok,Indonesia
2. Pertamina Central Hospital,Department of Cardiology and Vascular Medicine,Depok,Indonesia
3. Universitas Indonesia Hospital,Depok,Indonesia
4. Universitas Indonesia,Faculty of Mathematics and Natural Sciences,Department of Biology,Depok,Indonesia
5. UI Advisory Universitas Indonesia,Depok,Indonesia