1. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland
2. Department of Endocrinology, Diabetology, and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), CH-8091 Zurich, Switzerland
3. Department of Mechanical and Industrial Engineering, Northeastern University, 467 Egan Center, 02115 MA, Boston, USA