1 Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA.
2 National Institutes of Health, Bethesda, MD, USA.
3 Physics Department, Universitat Jaume I, Castello de la Plana, Spain.
4 Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
5 Department of Biological Sciences, Indian Institute of Science Education and Research Bhopal, Bhopal, India.
6 Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan.
7 Section on Molecular Transport, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.