Ceylan, Abdil, Fehmi Çalık, Serdar Geri, Murat Şen, Cuma Ece, and Mehmet Sumer. 2021. “Determining the Knowledge Levels and Opinions of Athletes Who Is Age Under-16 in Different Branches about Doping and Ergogenic Aids”. Progress in Nutrition 22 (4): e2020093. https://doi.org/10.23751/pn.v22i4.10984.