[1
]University of Tartu, Estonia
[2
]Lyon 1 University and Liris CNRS in Villeurbanne, France
[4
]Vrije Universiteit Amsterdam and Delft University of Technology, The Netherlands
[12
]Polytechnic University of Milan
[15
]Austrian Institute of Technology
[17
]Birkbeck, University of London
[19
]University of South Florida
[26
]University of British Columbia
[27
]Heidelberg University and Universität Wien
[30
]Budapest Univ. of Technology and Economics
[31
]Pacific Northwest National Lab
[35
]The University of Alabama