The reader will find below the list of guest referees who dedicated their time and expertise to the peer review process of the Journal over the past year. Rigorous, objective and timely peer review is crucial to sustain the high publication standards of the CPPM. We also recognize that pharmacogenomics and personalized medicine is a field of inquiry drawing from diverse disciplines and expert colleagues in different global regions. We are glad to take this opportunity to thank the CPPM editors, the international editorial advisory board and the guest referees for their availability, promptness and valuable comments that support the editorial goals of addressing the complexities and nuances of pharmacogenomics and personalized medicine for an international readership.