1. Great Ormond Street Hospital for Children; Pharmacy Department; Great Ormond Street London UK WC1N 3JH
2. Great Ormond Street Hospital for Children; Cardiology Department; Great Ormond Street London UK WC1N 3JH
3. Queen's University Belfast; Centre for Public Health; Institute of Clinical Sciences, Block B, Royal Victoria Hospital Grosvenor Road Belfast Northern Ireland UK BT12 6BJ