Table 2.

The number of publications of the top 20 institutions

Institute	Country	Total articles
University of London	England	188
University of Toronto	Canada	182
Imperial College London	England	164
Harvard University	USA	150
University of California System	USA	146
McGill University	Canada	113
University College London	England	110
Centre NationaL De Larecherche Scientifique	France	102
Johns Hopkins University	USA	95
University of Copenhagen	Denmark	85
Pennsylvania Commonwealth System of Higher Education PCSHE	USA	82
University of Southern California	USA	79
University of Washington	USA	77
University of Zurich	Switzerland	76
University of Washington Seattle	USA	75
University of Texas System	USA	73
Rigshospitalet	Denmark	68
Tel Aviv University	Israel	65
Ruprecht Karls University Heidelberg	Germany	64
University of Sydney	Australia	64