1. Department of Pharmaceutical Biology, Faculty of Pharmacy, Universitas Sumatera Utara, Medan, Indonesia.
2. Faculty of Pharmacy, Institut Kesehatan Medistra Lubuk Pakam, Deli Serdang, Indonesia.
3. Department of Pharmacology, Faculty of Pharmacy, Universitas Sumatera Utara, Medan, Indonesia.
4. Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Sumatera Utara, Medan, Indonesia.
5. Faculty of Pharmacy and Health Sciences, Universitas Sari Mutiara Indonesia, Medan, Indonesia.