Influence of a static magnetic field on the reproductive function, certain biochemical indices and behaviour of rats - Grzesik, Jan; Bortel, Maria; Duda, Dorota; Kuśka, Rafał; Ludyga, Kornel; Michnik, Jerzy; Smołka, Bogdan; Bogusław, Sowa; Trzeciak, Henryk; Zieliński, Grzegorz (Nofer Institute of Occupational Medicine)