Funding for this research was provided by:
World Association of Infectious Diseases and Immunological Disorders grant (WAidid2016_06)
Text and Data Mining valid from 2019-08-23
Received: 13 May 2019
Accepted: 18 August 2019
First Online: 23 August 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico, Milan, Italy (no. 418_2016bis), and written informed consent was obtained from all the participants’ parents or legal guardians.
: Written informed consent was obtained from all the participants’ parents or legal guardians.
: The authors declare that they have no competing interests.