1. Faculty of Pharmacy and Health Sciences, Sari Mutiara Indonesia University, Jalan Kapten Muslim No.79, 20123, Helvetia, Medan, Sumatera Utara, Indonesia.
2. Lincoln University, Jalan Stadium SS 7/15, 47301 Petaling Jaya, Selangor, Malaysia.
3. Lincoln University, Wisma Lincoln, 12-18, Jalan SS 6/12, 47301 Petaling Jaya, Selangor, Malaysia.