ACKNOWLEDGEMENTS
We thank the staff at Community Vaccination Centers at Ap Lei Chau
Sports Centre, Gleneagles Hospital Hong Kong, and Sun Yat-Sen Memorial
Park Sports Centre. The investigators are grateful to all clinical
research team members and laboratory staff of Department of Paediatrics
and Adolescent Medicine of the University of Hong Kong, for their
research support. We are most thankful to the study participants, as
well as clinicians and laboratory staff who have provided clinical care
and testing to the patients.