Dear all, Sorry about the typo's in the previous message. Sometimes my keyboard does not werk da wey I weshed et wwooed. :-)) Cheers Rhian Rhian Cope BSc BVSc PhD Assistant Professor Morphology University of Illinois at Urbana-Champaign 2001 S Lincoln Ave Urbana, Il 61802, USA Ph: 1-217-244-1583 Fax: 1-217-244-1652 Email: [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%