1. Department of Pharmaceutical Technology Faculty of Pharmacy , University of Ljubljana , 1000 Ljubljana , Slovenia
2. Sandoz Development Center , Lek d.d. 1526 Ljubljana , Slovenia
3. Jožef Štefan Institute , 1000 Ljubljana Slovenia
4. Research Center for Pharmaceutical Engineering (RCPE) GmbH, 8010 , Graz Austria
5. Institute of Process and Particle Engineering , Graz University of Technology 8010 , Graz , Austria