Zylbersztejn, Ania; Lewis, Kate; Nguyen, Vincent; Matthews, Jacob; Winterburn, Isaac; Karwatowska, Lucy; Barnes, Sarah; ... Gilbert, Ruth; + view all Zylbersztejn, Ania; Lewis, Kate; Nguyen, Vincent; Matthews, Jacob; Winterburn, Isaac; Karwatowska, Lucy; Barnes, Sarah; Lilliman, Matthew; Saxton, Jennifer; Stone, Antony; Boddy, Kate; Downs, Johnny; Logan, Stuart; Rahi, Jugnoo; Black-Hawkins, Kristine; Dearden, Lorraine; Ford, Tamsin; Harron, Katie; De Stavola, Bianca; Gilbert, Ruth; - view fewer (2023) Evaluation of variation in special educational needs provision and its impact on health and education using administrative records for England: umbrella protocol for a mixed-methods research programme. BMJ Open , 13 (11) , Article e072531. 10.1136/bmjopen-2023-072531.