Robert J Brogan1
, Despina Eleftheriou1
, James Gnanapragasam2
, Nigel J Klein3
and Paul A Brogan1 
1
Department of Paediatric Rheumatology, UCL Institute of Child Health and Great Ormond Street Hospital, 30 Guilford Street, London, UK
2
Congenital Cardiac Centre, North Wing, Southampton University Hospitals NHS Trust, Tremona Road, Southampton, UK
3
Department of Infectious disease and Microbiology, UCL Institute of Child Health and Great Ormond Street Hospital, 30 Guilford Street, London, UK