For the last past 3 months we were hostin special visitors from Spain and Serbia. First was dr. Joaquin Seras-Franzoso form the Vall D’Hebron Institute of Research (VHIR), Barcelona, Spain. Which got the EMBO Scientific Exchange grant, for visiting our lab. Second visitor was PhD student Lidija Filipovic, from Faculty of Chemistry, University of Belgrade (Hemijski Fakultet Univerzitet u Beogradu) which got a Cmepius fellowship. Both of our guests are collaborating with Assoc. Prof. Dr. Ario de Marco. Dear Lidija and Joaquin a warm thank you for your collaboration, and hope to see you soon again in the future.