Serum levels of bone formation and resorption markers in relation to vitamin D status in professional gymnastics and physically active men during upper and lower body high-intensity exercise - Mieszkowski, J.; Kochanowicz, A.; Piskorska, E.; Niespodzinski, B.; Siódmiak, J.; Busko, K.; Stankiewicz, B.; Olszewska-Slonina, D.; Antosiewicz, J. (Journal of the International Society of Sports Nutrition, 2021)