[1] ZA Bashlyaeva Childrens Municipal Clin Hosp, Moscow, Russia
[2] Pirogov Russian Natl Res Med Univ, Moscow, Russia
[3] Sechenov First Moscow State Med Univ, Inst Childs Hlth, Dept Paediat & Paediat Infect Dis, Sechenov Univ, Moscow, Russia
[4] Univ Hertfordshire, Sch Phys Astron & Math, Hatfield, Herts, England
[5] Univ Coll Cork, Sch Appl Psychol, Cork, Ireland
[6] Univ Pisa, Dept Clin & Expt Med, Sect Pediat, Pisa, Italy
[7] Otto von Guericke Univ, Fac Med, Inst Social Med & Hlth Syst Res, Magdeburg, Germany
[8] Univ Leipzig, Med Fac, Dept Pediat, Pediat Epidemiol, Leipzig, Germany
[9] Minist Healthcare Russian Federat, Russian Med Acad Continuous Profess Educ, Moscow, Russia
[10] Sechenov First Moscow State Med Univ, Inst Childs Hlth, Dept Paediat & Paediat Rheumatol, Sechenov Univ, Moscow, Russia
[11] Res Inst Healthcare Org, Moscow, Russia
[12] Med Management Moscow Healthcare Dept, Moscow, Russia
[13] Univ Washington, Inst Hlth Metr & Evaluat, Seattle, WA 98195 USA
[14] Univ Oxford, ISARIC Global Support Ctr, Nuffield Dept Med, Oxford, England
[15] Univ Glasgow, Ctr Virus Res, MRC, Glasgow, Lanark, Scotland
[16] Univ Colorado, Childrens Hosp Colorado, Dept Pediat, Sect Allergy Immunol,Sch Med, Aurora, CO USA
[17] Imperial Coll Healthcare NHS Trust, Paediat Infect Dis, London, England
[18] Imperial Coll London, Div Psychiat, London, England
[19] Univ Edinburgh, Dept Child Life & Hlth, Edinburgh, Midlothian, Scotland
[20] Royal Hosp Children, Paediat Infect Dis, Glasgow, Lanark, Scotland
[21] Fdn Policlin Univ A Gemelli IRCCS, Dept Woman & Child Hlth & Publ Hlth, Rome, Italy
[22] Univ Cattolica Sacro Cuore, Clin Intensivol & Perioperatorie, Dipartimento Sci Biotecnol Base, Rome, Italy
[23] Univ Cattolica Sacro Cuore, Ctr Global Hlth Res & Studies, Rome, Italy
[24] Coventry Univ, Coventry, W Midlands, England
[25] Univ Surrey, Fac Hlth & Med Sci, Sch Psychol, Guildford, Surrey, England
[26] Univ Liverpool, Fac Hlth & Life Sci, Inst Infect Vet & Ecol Sci, Hlth Protect Res Unit Emerging & Zoonot Infect, Liverpool, Merseyside, England
[27] Alder Hey Childrens Hosp, Dept Resp Med, Liverpool, Merseyside, England
[28] Imperial Coll London, Fac Med, Natl Heart & Lung Inst, Inflammat Repair & Dev Sect, London, England
[29] Res & Clin Ctr Neuropsychiat, Moscow, Russia