1. Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
2. Department of Micro- and Nanotechnology, Technical University of Denmark, Ørsteds Plads, 2800 Kgs. Lyngby, Denmark
3. Danish National Research Foundation and Villum Fondens Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), 2800 Kgs. Lyngby, Denmark