Ajdžanović, Vladimir, Department of Cytology, Institute for Biological Research “Siniša Stanković” - National Institute of Republic of Serbia, University of Belgrade, Despot Stefan Blvd. 142, 11060 Belgrade, Serbia, Tel: +381 11 2078 321; Fax: +381 11 2761 433; E-mail: avlada@ibiss.bg.ac.rs, Serbia