Research Paper: A Globally Optimal k-Anonymity Method for the De-Identification of Health Data. - Khaled El Emam; Fida Kamal Dankar; Romeo Issa; Elizabeth Jonker; Daniel Amyot; Elise Cogo; Jean-Pierre Corriveau; Mark Walker; Sadrul Chowdhury; Regis Vaillancourt; Tyson Roffey; Jim Bottomley (J. Am. Medical Informatics Assoc., 2009)