The effect of combined exposure to chemical and physical factors on the nervous system during aluminum production: a preliminary finding - Sińczuk-Walczak, Halina; Szymczak, Maria; Aniołczyk, Halina; Brzeźnicki, Sławomir; Raźniewska, Grażyna; Trzcinka-Ochocka, Małgorzata; Matczak, Wanda (Nofer Institute of Occupational Medicine)