Gaughran, F, Stringer, D, Berk, M, Smith, S, Taylor, D, Whiskey, E, Landau, S, Murray, R, McGuire, P, Gardner-Sood, P, Wojewodka, G, Ciufolini, S, Jordan, H, Clarke, J, Allen, L, Krivoy, A, Stubbs, B, Lowe, P, Arbuthnott, M, Rathod, S, Boardman, A, Firdosi, M & McGrath, J J 2020, ' Vitamin D supplementation compared to placebo in people with First Episode psychosis-Neuroprotection Design (DFEND) : a protocol for a randomised, double-blind, placebo-controlled, parallel-group trial ', Trials, vol. 21, no. 1, 14 . https://doi.org/10.1186/s13063-019-3758-9 Gaughran, F P, Stringer, D, Berk, M, Smith, S M E, Taylor, D M, Whiskey, E, Landau, S, Murray, R M, McGuire, P, Gardner-Sood, P, Wojewodka, G M, Ciufolini, S, Jordan, H I, Clarke, J, Allen, L E, Krivoy, A, Stubbs, B, Lowe, P, Arbuthnott, M, Rathod, S, Boardman, A, Firdosi, M & McGrath, J J 2020, ' Vitamin D supplementation compared to placebo in people with First Episode psychosis-Neuroprotection Design (DFEND): a protocol for a randomised, double-blind, placebo-controlled, parallel-group trial ', Trials, vol. 21, no. 1, 14 . https://doi.org/10.1186/s13063-019-3758-9 Trials Trials, Vol 21, Iss 1, Pp 1-12 (2020)