 Complete the following phrase:  Arkadiusz Sołtysiak and Marta Bialon from the University of Warsaw recorded and analyzed fifty-nine dental non-metric traits in 350 human skeletons. The skeletons were retrieved from three sites Tell Ashtara, Tell Masaikh, and Jebel Mashtale in the lower Euphrates dating from the Early Bronze Age up to the Early Islamic period Umayyad and Abbasid and modern period. The results suggested that no major gene flow occurred in the middle Euphrates valley between the 3rd millennium BCE and the early 2nd millennium CE. However, the 