- (i) conditions that are associated with elevated serum levels of cytokines and other inflammatory markers (major inflammatory, chronic infectious or autoimmune systemic disease, cardiovascular disease, diabetes mellitus type I and II), or (ii) any concomitant or prior malignant disease. Those recruited for evaluation on cognitive functions will also be excluded for (iii) major pre-existing psychiatric history (including depression), dementia, alcohol abuse, or currently using a psychotropic medication that might lead to cognitive problems, (iv) insufficient English skills to comprehend the task instructions, and (v) impaired colour vision for reasons related to some of the test stimuli and tasks.