An Investigation of O-Demethyl Tramadol/Tramadol Ratio for Cytochrome P450 2D6 Phenotyping: The CYTRAM Study oleh Blandine De La Gastine, Soizic Percevault, Laurent Varin, Nicolas Richard, Fabienne Fobe, Benoît Plaud, Georges Daccache, Vincent Compere, Jean-Jacques Parienti, Antoine Coquerel, Magalie Loilier, Nathalie Bleyzac, Laurent Bourguignon, Sylvain Goutelle, Véronique Lelong-Boulouard