Patient identification
Patients were initially identified from a database in the Allergy Department at the Children’s Hospital at Westmead (CHW), New South Wales (NSW), Australia 9, consisting of children with FPIES aged between 1 months and 6 years at the time of diagnosis, presenting for management between 1997 and 2017. Patients were screened for inclusion based upon modified criteria from international consensus guidelines outlined by Nowak et al. 1 (Table 1), limited to those meeting the major and 3 or more minor criteria.