burnout. Secondary and tertiary prevention (aka treatment and management) Hätinen et al. list a number of common treatments, including treatment of any outstanding medical conditions, stress management, time management, depression treatment, psychotherapies, ergonomic improvement and other physiological and occupational therapy, physical exercise and relaxation. They have found that is more effective to have a greater focus on "group discussions on work related issues", and discussion about "work and private life interface" and other personal needs with psychologists and workplace representatives. Jac JL van der Klink and Frank JH van Dijk suggest stress inoculation training, cognitive restructuring, graded activity and "time contingency" (progressing based on a timeline rather than patient's comfort) are effective methods of treatment. Kakiashvili et al. said that "medical treatment of burnout is mostly symptomatic: it involves measures to prevent and treat the symptoms." They say the use of anxiolytics and sedatives to treat burnout related stress is effective, but does nothing to change the sources of stress. They say the poor sleep often caused by burnout (and the subsequent fatigue) is best treated with hypnotics and CBT (within which they include "sleep hygiene, education, relaxation training, stimulus control, and cognitive therapy"). They advise against the use of antidepressants as they worsen the hypothalamic–pituitary–adrenal axis dysfunction at the core of burnout. They also believe "vitamins and minerals are crucial in addressing adrenal and HPA axis dysfunction," noting the importance of specific nutrients. Omega-3 fatty acids may be helpful. DHA supplementation may also be useful for moderating norepinephrine. 11 beta-hydroxysteroid dehydrogenase (and potentially other metabolites of liquorice root extract) may help with lowered cortisol response. Salomonsson et al. found that for workers with exhaustion disorder, CBT was better than a Return to Work Intervention (RTW-I) for reducing stress; and that people whose symptoms were primarily depression, anxiety or insomnia had reduced total time away from work after a RTW-I than for CBT. Ybe Meesters found that light therapy (similar to that used for Seasonal Affective Disorder) may be effective. Gordon Parker et al. found that the most useful treatment strategies appear to be talking to someone and seeking support, walking or other exercise, mindfulness and meditation, improving sleep, and leaving work completely or taking time off work. Korczac et al. in a 2012 literature review found that "only for cognitive behavioural therapy (CBT) exists an adequate number of studies which prove its efficacy." Ahola et al. in a 2014