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International ranking systems for universities and institutions: a critical appraisal

John PA Ioannidis*, Nikolaos A Patsopoulos, Fotini K Kavvoura, Athina Tatsioni, Evangelos Evangelou, Ioanna Kouri, Despina G Contopoulos-Ioannidis and George Liberopoulos

BMC Medicine 2007, 5:30  doi:10.1186/1741-7015-5-30

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