Development and validation of the Klinefelter-Associated Neurodevelopmental Difficulties (KAND) Checklist: a three-phase mixed-methods study.

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Title: Development and validation of the Klinefelter-Associated Neurodevelopmental Difficulties (KAND) Checklist: a three-phase mixed-methods study.
Authors: Theelen K; Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium. kaat.theelen@vub.be., Galasso C; Centre for Rare Diseases, Universitair Ziekenhuis Brussel, Brussels, Belgium., Cools W; Support for Quantitative and Qualitative Research (SQUARE), Vrije Universiteit Brussel, Brussels, Belgium., Gies I; Division of Pediatric Endocrinology, Department of Pediatrics, Universitair Ziekenhuis Brussel, Brussels, Belgium.; Vitality Research Group, Vrije Universiteit Brussel, Brussels, Belgium., Vanclooster S; Mental Health and Wellbeing Research Group, Department of Health Sciences, Vrije Universiteit Brussel, Brussels, Belgium.; Centre for Medical Genetics, Antwerp University Hospital, Antwerp, Belgium., Jansen AC; Mental Health and Wellbeing Research Group, Department of Health Sciences, Vrije Universiteit Brussel, Brussels, Belgium.; Division of Pediatric Neurology, Department of Pediatrics, Antwerp University Hospital, Antwerp, Belgium.; Translational Neurosciences, University of Antwerp, Antwerp, Belgium.
Source: Journal of neurodevelopmental disorders [J Neurodev Disord] 2026 Jan 30; Vol. 18 (1), pp. 7. Date of Electronic Publication: 2026 Jan 30.
Publication Type: Journal Article; Validation Study
Journal Info: Publisher: BioMed Central Country of Publication: England NLM ID: 101483832 Publication Model: Electronic Cited Medium: Internet ISSN: 1866-1955 (Electronic) Linking ISSN: 18661947 NLM ISO Abbreviation: J Neurodev Disord Subsets: MEDLINE
Database: MEDLINE Ultimate
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  Data: Development and validation of the Klinefelter-Associated Neurodevelopmental Difficulties (KAND) Checklist: a three-phase mixed-methods study.
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  Data: <searchLink fieldCode="AU" term="%22Theelen+K%22">Theelen K</searchLink>; Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Brussels, Belgium. kaat.theelen@vub.be.<br /><searchLink fieldCode="AU" term="%22Galasso+C%22">Galasso C</searchLink>; Centre for Rare Diseases, Universitair Ziekenhuis Brussel, Brussels, Belgium.<br /><searchLink fieldCode="AU" term="%22Cools+W%22">Cools W</searchLink>; Support for Quantitative and Qualitative Research (SQUARE), Vrije Universiteit Brussel, Brussels, Belgium.<br /><searchLink fieldCode="AU" term="%22Gies+I%22">Gies I</searchLink>; Division of Pediatric Endocrinology, Department of Pediatrics, Universitair Ziekenhuis Brussel, Brussels, Belgium.; Vitality Research Group, Vrije Universiteit Brussel, Brussels, Belgium.<br /><searchLink fieldCode="AU" term="%22Vanclooster+S%22">Vanclooster S</searchLink>; Mental Health and Wellbeing Research Group, Department of Health Sciences, Vrije Universiteit Brussel, Brussels, Belgium.; Centre for Medical Genetics, Antwerp University Hospital, Antwerp, Belgium.<br /><searchLink fieldCode="AU" term="%22Jansen+AC%22">Jansen AC</searchLink>; Mental Health and Wellbeing Research Group, Department of Health Sciences, Vrije Universiteit Brussel, Brussels, Belgium.; Division of Pediatric Neurology, Department of Pediatrics, Antwerp University Hospital, Antwerp, Belgium.; Translational Neurosciences, University of Antwerp, Antwerp, Belgium.
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  Data: <searchLink fieldCode="JN" term="%22101483832%22">Journal of neurodevelopmental disorders</searchLink> [J Neurodev Disord] 2026 Jan 30; Vol. 18 (1), pp. 7. <i>Date of Electronic Publication: </i>2026 Jan 30.
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  Data: <i>Publisher: </i><searchLink fieldCode="PB" term="%22BioMed+Central%22">BioMed Central </searchLink><i>Country of Publication: </i>England <i>NLM ID: </i>101483832 <i>Publication Model: </i>Electronic <i>Cited Medium: </i>Internet <i>ISSN: </i>1866-1955 (Electronic) <i>Linking ISSN: </i><searchLink fieldCode="IS" term="%2218661947%22">18661947 </searchLink><i>NLM ISO Abbreviation: </i>J Neurodev Disord <i>Subsets: </i>MEDLINE
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        Value: 10.1186/s11689-025-09670-0
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      – TitleFull: Development and validation of the Klinefelter-Associated Neurodevelopmental Difficulties (KAND) Checklist: a three-phase mixed-methods study.
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              Text: 2026 Jan 30
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