Phenotypic and genotypic analysis of pediatric patients with congenital isolated growth hormone deficiency resulting from biallelic variants in the GHRHR gene: a Belgian registry study. - Van de Velde S; Boros E; Brunelle C; Beckers D; Thomas M; Heinrichs C; Vlaeminck J; De Schepper J; Brachet C (European journal of pediatrics, 2026)