1 Department of Industrial and Physical Pharmacy, Purdue University, 575 Stadium Mall Drive, West Lafayette, Indiana 47907. Electronic address: lstaylor@purdue.edu.
2 Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
3 Centre for Pharmaceutical Engineering Science and Institute of Pharmaceutical Innovation, University of Bradford, Richmond Road, Bradford BD7 1DP, UK.
4 Department of Pharmaceutical Engineering, School of Pharmaceutical Science, Aichi Gakuin University, Kusumoto, Chikusa, Nagoya 464-8650, Japan.
5 Center for Drug Delivery Systems, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201210, China.