“…Previous reviews have thoroughly documented the history of PGD (Jordan & Litz, 2014; Maercker & Lalor, 2012; Wagner & Maercker, 2010), and therefore we provide a brief overview relevant to the current ICD-11 PGD criteria. In 1993, Horowitz and colleagues developed the first diagnostic criteria for a bereavement-related disorder, termed ‘pathological’ then ‘complicated’ grief (CG) (Horowitz, Bonanno, & Holen, 1993; Horowitz et al, 1997).…”