Zabalza, Ramón, Iñaki Múgica, Fernando Sistiaga, Adolfo Garrido, José Ignacio Emparanza, and Paul Zubillaga. 2014. “Assessment of Vitamin D Supplementation in People With Intellectual Disability”. Journal of Intellectual Disability - Diagnosis and Treatment 2 (1):46-53. https://doi.org/10.6000/2292-2598.2014.02.01.6.