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. 2023 Mar 17;37(15):3256–3262. doi: 10.1038/s41433-023-02502-2

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© The Author(s), under exclusive licence to The Royal College of Ophthalmologists 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

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Fig. 1 — US United States of America (ACGME), ICO International Council of Ophthalmology, RCOPH The Royal College of Ophthalmologists, AIOS All India Ophthalmological Society, PAAO Pan-American Association of Ophthalmology, SOE-YO European Society of Ophthalmology’s Young Ophthalmologist.