1. Gene Transfer Technology Group, Institute for Women's Health; University College London; London UK
2. Metabolic Medicine Department; Great Ormond Street Hospital for Children NHS Foundation Trust; London UK
3. Genetics and Genomic Medicine Programme, Great Ormond Street Institute of Child Health; University College London; London UK
4. Wits/SAMRC Antiviral Gene Therapy Research Unit, Faculty of Health Sciences; University of the Witwatersrand; Johannesburg South Africa