Siotos, C. ., Stergios, K. ., Naska, A. ., Frountzas, M. ., , Perrea, D. ., & Nikiteas, N. . (2018). The impact of fast track protocols in upper gastrointestinal surgery: A meta-analysis of observational studies. The Surgeon : Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland. https://doi.org/10.1016/j.surge.2017.12.001 (Original work published 2018)

Naska, A. ., Lagiou, A. ., & Lagiou, P. . Dietary assessment methods in epidemiological research: current state of the art and future prospects. F1000Research, 6, 926. https://doi.org/10.12688/f1000research.10703.1 (Original work published 2017)