1. Institute for Process and Particle Engineering, Graz University of Technology; Inffeldgasse 13/III, 8010 Graz; Austria
2. Research Center Pharmaceutical Engineering GmbH; Inffeldgasse 13/III, 8010 Graz; Austria
3. Pharmaceutical Development; AstraZeneca, Charter Way, Macclesfield, SK10 2NA; U.K.