Comment on

• Randomized controlled trial of vitamin D supplementation in children with autism spectrum disorder.

  Saad K, Abdel-Rahman AA, Elserogy YM, Al-Atram AA, El-Houfey AA, Othman HA, Bjørklund G, Jia F, Urbina MA, Abo-Elela MGM, Ahmad FA, Abd El-Baseer KA, Ahmed AE, Abdel-Salam AM. Saad K, et al. J Child Psychol Psychiatry. 2018 Jan;59(1):20-29. doi: 10.1111/jcpp.12652. Epub 2016 Nov 21. J Child Psychol Psychiatry. 2018. Retraction in: J Child Psychol Psychiatry. 2019 Jun;60(6):711. doi: 10.1111/jcpp.13076. PMID: 27868194 Retracted. Clinical Trial.
• Letter to the Editor: Unreported statistics lead to unverifiable results in study of vitamin D supplementation in children with autism spectrum disorder - Comment regarding Saad, K., et al. (2016).

  Beale DJ. Beale DJ. J Child Psychol Psychiatry. 2018 Jan;59(1):e1. doi: 10.1111/jcpp.12776. J Child Psychol Psychiatry. 2018. PMID: 29235649 No abstract available.
• Letter to the author from Editor-in-Chief seeking clarifications.

  Sonuga-Barke E. Sonuga-Barke E. J Child Psychol Psychiatry. 2018 Jan;59(1):e2-e3. doi: 10.1111/jcpp.12800. J Child Psychol Psychiatry. 2018. PMID: 29235650 No abstract available.
• Letter to the Editor: Unreported statistics lead to unverifiable results in study of vitamin D supplementation in children with autism spectrum disorder - Comment regarding Saad, K., et al. (2016).

  Stevenson J. Stevenson J. J Child Psychol Psychiatry. 2018 Jan;59(1):e1-e2. doi: 10.1111/jcpp.12799. J Child Psychol Psychiatry. 2018. PMID: 29235653 No abstract available.