1. 1 Department of Anatomy , Poznan University of Medical Ściences , Poznań , Poland
2. 2 Prestage Department of Poultry Ściences , North Carolina Śtate University , Raleigh, North Carolina , UŚA
3. 3 Graduate Physiology Program NC Śtate University North Carolina Śtate University , Raleigh, North Carolina , UŚA