Fig. 1From: 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 trialSPIRIT figure. Schedule of enrolment, interventions, and assessments in the DFEND Study. *Blood sampling for calcium levels (including a parathyroid hormone test if hypercalcaemic) will always be done at month 3 but can be done at all monthly visits if patient reports nausea or vomiting. NOS Nottingham Onset Schedule, PANSS Positive and Negative Syndrome Scale, GAF Global Assessment Functioning, CDS Calgary Depression Scale, OPCRIT Operational Criteria, IPAQ International Physical Activity Questionnaire, SIMPAQ Simple Physical Activity QuestionnaireBack to article page