Lead toxicosis of captive vultures: case description and responses to chelation therapy oleh Pikula Jiri, Hajkova Pavlina, Bandouchova Hana, Bednarova Ivana, Adam Vojtech, Beklova Miroslava, Kral Jiri, Ondracek Karel, Osickova Jitka, Pohanka Miroslav, Sedlackova Jana, Skochova Hana, Sobotka Jakub, Treml Frantisek, Kizek Rene