“…Major depressive disorder (MDD) and anxiety disorders (ADs), one of its most common comorbid groups of disorders (Fava et al, 2000), are each among the most common psychiatric disorders worldwide, (Malhi & Mann, 2018;van Tol et al, 2021) with devastating effects on virtually all areas of a patient's life as well as contributing significantly to the overall burden of disease (James et al, 2018;Kessler & Greenberg, 2002;Silverstone & von Studnitz, 2003). Comorbid MDD and AD are shown to have significantly less favourable treatment outcomes, longer illness duration, higher impact on quality of life and higher suicidal risks compared with MDD or AD alone (Kessler et al, 2015;van Tol et al, 2021).…”