Cardiorespiratory fitness in volleyball athletes following a COVID-19 infection: A cross-sectional study - Milovancev, A.; Avakumovic, J.; Lakicevic, N.; Stajer, V.; Korovljev, D.; Todorovic, N.; Bianco, A.; Maksimovic, N.; Ostojic, S.; Drid, P. (International Journal of Environmental Research and Public Health, 2021)