1. Department of Pharmacy, Faculty of Medicine, Blvd. Dr Zorana Djindjica 81, 18108 Nis, Republic of Serbia
2. Messer Vardar Tehnogas, Istočna industrijska zona BB 1040, 1000 Skopje, North Macedonia
3. Petrapharm, Lava Tolstoja bb, Pirot, Republic of Serbia