Eminent scientists working together in their fields of expertise, students spending a period at sister universities for courses or research, administrative staff who know what is needed to create an international environment that is conducive to high-quality training and research: these are our reasons for seeking meaningful partnerships all over the world. For any partnership to be mutually beneficial, we feel that research profiles and ambitions need to match. It is also our firm belief that academic relationships, whether they involve educational or research cooperation, should be longterm.