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• Adam Mickiewicz University Repository (1)
• Biblioteca Digital Loyola - Universidad de Deusto (2)
• BORIS: Bern Open Repository and Information System - Berna - Suiça (2)
• Boston University Digital Common (2)
• Digitale Sammlungen - Goethe-Universität Frankfurt am Main (4)
• Gallica, Bibliotheque Numerique - Bibliothèque nationale de France (French National Library) (BnF), France (1)
• Helvia: Repositorio Institucional de la Universidad de Córdoba (1)
• National Center for Biotechnology Information - NCBI (1)
• School of Medicine, Washington University, United States (1)
• Universidade Metodista de São Paulo (1)
• University of Michigan (28)