1. 1Department of Toxicology, Faculty of Pharmacy, Ankara University, Tandogan, Turkey
2. 2Department of Toxicology, Faculty of Pharmacy, Gazi University, Etiler, Turkey
3. 3Gastrointestinal Surgery Department, Yuksek Ihtisas Hospital, Sihhiye, Turkey
4. 4Ankara, Eregli Iron and Steel Works Co., Karadeniz Eregli, Turkey