Impact of vitamin D on neurocognitive function in dementia, depression, schizophrenia and ADHD oleh Nithila Mariam Roy, Lara Al-Harthi, Neela Sampat, Rawan Al-Mujaini, Sangeetha Mahadevan, Samir Al Adawi, Musthafa Mohamed Essa, Lyutha Al Subhi, Buthaina Al-Balushi, M. Walid Qoronfleh