Dr Breen has been a member of the European Medicines Agency Committee for Advanced Therapies since 2013. He is one of two experts who have been nominated by patient organizations. His areas of expertise are pre-clinical studies and the assessment of patient-reported outcomes in clinical studies. He has an academic background having initially worked at the University of Dundee (UK) and, more recently, has been involved in the strategic development of medical research programmes, both in the public and not-for-profit sectors within the UK. He is the author of over 70 peer reviewed scientific papers and regularly acts as a peer reviewer for journal manuscripts and research grant applications to a variety of funding bodies.