The relationship between Elevated Body Mass Index, Exhaled Nitic Oxide, Vitamin D Serum Concentration and Asthma Control – the Cross-sectional Pilot Study - Wytrychowski, Krzysztof; Obojski, Andrzej; Radzik-Zając, Joanna; Kumorek, Martyna; Hans-Wytrychowska, Anna (Family Medicine & Primary Care Review, 2020)