Yasumitsu-Lovell, KahokoThompson, LucyFernell, ElisabethEitoku, MasamitsuSuganuma, NarufurmiGillberg, ChristopherJapan Environment and Children’s Study Group2024-02-232024-02-232024-01Yasumitsu-Lovell, K, Thompson, L, Fernell, E, Eitoku, M, Suganuma, N, Gillberg, C & Japan Environment and Children’s Study Group 2024, 'Vitamin D deficiency associated with neurodevelopmental problems in 2-year-old Japanese boys', Acta Paediatrica, vol. 113, no. 1, pp. 119-126. https://doi.org/10.1111/apa.169980803-5253ORCID: /0000-0001-7461-3262/work/145601424https://hdl.handle.net/2164/22840Acknowledgements The authors thank the JECS participants, as well as Nagamasa Maeda and Mikiya Fujieda of the Kochi Regional Centre of the JECS, and Ingrid Vinsa at the Gillberg Neuropsychiatry Centre. Funding information The Japan Environment and Children's Study was funded by the Ministry of Environment, Japan8691496engJapan Environment and Children's StudyKyoto Scale of Psychological Development 2001neurodevelopmental problemssex differencesvitamin D deficiencyR MedicineRC0321 Neuroscience. Biological psychiatry. NeuropsychiatrySupplementary DataRRC0321Journal article10.1111/apa.169981131