Received: 16 September 2019
Accepted: 27 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: Ethical approval was not required for this retrospective, non-interventional study as all data were anonymized and based on routine procedures of the outpatient service.
: Infant’s parents or guardians had given consent to utilize collected data.
: The authors declare that they have no competing interests.