The effect of 50 Hz magnetic field of different shape on oxygen metabolism in blood platelets: in vitro studies - Henrykowska, Gabriela; Jankowski, Wojciech; Pacholski, Krzysztof; Lewicka, Małgorzata; Śmigielski, Janusz; Dziedziczak-Buczyńska, Maria; Buczyński, Andrzej (Nofer Institute of Occupational Medicine)