Thank you everybody for your replies. I'll try the suggested methods and let you know which worked best. Szilvi Mezey Szilvia Mezey PhD student Semmelweis University Dept. of Anatomy, Histology and Embryology Tuzolto u. 58. Budapest, 1094, Hungary T.: +36-12156920/3687 F.: +36-12155158 E-mail: mezey <@t> ana.sote.hu