A Guide to Different Intensities of Exercise, Vaccination, and Sports Nutrition in the Course of Preparing Elite Athletes for the Management of Upper Respiratory Infections during the COVID-19 Pandemic: A Narrative Review. - Agha-Alinejad H; Ahmadi Hekmatikar AH; Ruhee RT; Shamsi MM; Rahmati M; Khoramipour K; Suzuki K (International journal of environmental research and public health, 2022)