Reconciling uncertainty of costs and outcomes with the need for access to orphan medicinal products: a comparative study of managed entry agreements across seven European countries. Thomas Morel, Francis Arickx, Gustaf Befrits, Paolo Siviero, Caroline van der Meijden, Entela Xoxi and Steven Simoens; Orphanet Journal of Rare Diseases 2013, 8:198 doi:10.1186/1750-1172-8-198
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