Footnotes

• Collaborators CORAL study group: Liam O’Mahony (APC UCC), Naomi McCallion, Martin White, Marguerite Lawler (Paediatrics and Child Health, RCSI), Aideen Byrne, John Fitzsimons (Children’s Health Ireland).

• Contributors SB co-designed the developmental aspect of the CORAL Study, designed the eye-tracking study, collected data, analysed data and wrote the paper. EO’F designed the eye-tracking study, collected eye-tracking data and edited the paper. HS collated data, assisted in analysis and edited the paper. SL provided input on the eye-tracking study and eye-tracking data analysis, and edited the paper. NJ designed the eye-tracking study, provided expertise on data acquisition and analysis, and edited the paper. FB provided statistical input and edited the paper. RF recruited participants, collected data and edited the paper. SH recruited participants, collected data and edited the paper. JM designed the eye-tracking study, provided input on eye-tracking analysis and edited the paper. JH is PI of the CORAL Study. He conceived and designed the CORAL Study and the developmental substudy. He recruited participants, collected data, interpreted data and wrote the paper. He designed the eye-tracking study. He is the guarantor of the work.

• Funding This work was supported by Temple Street Hospital Foundation in Dublin, Ireland and the Clemens Von Pirquet Foundation in Geneva, Switzerland. SL was funded through Irish Research Council (grant GOIPC/2020/309).

• Competing interests JH is director of Clemens Von Pirquet Foundation. No other conflicts declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

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