Victoria Holdstock a, †
Contributed equally
, Jonathan Twynam-Perkins b, c, †
Contributed equally
, Timothy Bradnock d, Elizabeth M Dickson e, Kathleen Harvey-Wood f, Pota Kalima g, Jill King h, William J Olver i, Mustafa Osman h, Atul Sabharwal d, e, Andrew Smith j, Stefan Unger b, c, Louisa Pollock l, Ross Langley a, k, ‡
Contributed equally
, Philip Davies a, ‡
Contributed equally
, Thomas C Williams a, c, ‡
Contributed equally

a Department of Respiratory and Sleep Medicine, Royal Hospital for Children, Glasgow G51 4TF, UK
b Department of Respiratory and Sleep Medicine, Royal Hospital for Children and Young People, Edinburgh, UK
c Department of Child Life and Health, University of Edinburgh, Edinburgh, UK
d Department of Paediatric Surgery, Royal Hospital for Children, Glasgow, UK
e Scottish Microbiology Reference Laboratories, Glasgow Royal Infirmary, Glasgow, UK
f Microbiology Department, Queen Elizabeth University Hospital, Glasgow, UK
g Microbiology Department, Royal Infirmary of Edinburgh, Edinburgh, UK
h Department of Paediatrics, Royal Aberdeen Children’s Hospital, Aberdeen, UK
i Department of Microbiology, Aberdeen Royal Infirmary, Aberdeen, UK
j College of Medical, Veterinary and Life Sciences, Glasgow Dental School, University of Glasgow, Glasgow, UK
k Maternal and Child Health, University of Glasgow, Glasgow, UK
l Department of Paediatric Infectious Diseases and Immunology, Royal Hospital for Children, Glasgow, UK