Chylińska-Wrzos, P., Lis-Sochocka, M., Wawryk-Gawda, E., Bulak, K., & Jodłowska-Jędrych, B. (2016). Do medical students have a positive outlook on the world?. Polish Journal of Public Health, 126(3), 126-129. https://doi.org/10.1515/pjph-2016-0026