WangT, ShanL, DuL, et al.Serum concentration of 25-hydroxyvitamin D in autism spectrum disorder: A systematic review and meta-analysis. Eur Child Adolesc Psychiatry, 2016; 25:341–350.
2.
WaldmanM, NicholsonS, AdilovN, et al.Autism prevalence and precipitation rates in California, Oregon, and Washington counties. Arch Pediatr Adolesc Med, 2008; 162:1026–1034.
3.
HebertKJ, MillerLL, JoinsonCJ. Association of autistic spectrum disorder with season of birth and conception in a UK cohort. Autism Res, 2010; 3:185–190.
4.
Barnevik-OlssonM, GillbergC, FernellE. Prevalence of autism in children born to Somali parents living in Sweden: A brief report. Dev Med Child Neurol, 2008; 50:598–601.
5.
MeguidNA, HashishAF, AnwarM, et al.Reduced serum levels of 25-hydroxy and 1,25-dihydroxy vitamin D in Egyptian children with autism. J Altern Complement Med, 2010; 16:641–645.
6.
SaadK, Abdel-RahmanAA, ElserogyYM, et al.Vitamin D status in autism spectrum disorders and the efficacy of vitamin D supplementation in autistic children. Nutr Neurosci, 2016; 19:346–351.
7.
SaadK, Abdel-RahmanAA, ElserogyYM, et al.Randomized controlled trial of vitamin D supplementation in children with autism spectrum disorder. J Child Psychol Psychiatry, 2016; doi: 10.1111/jcpp.12652.
