“…Of the 23 trials, 13 were judged as high risk, 9,20,35,43–45,47,48,51,55,62–64 5 as unclear risk, 11,13,37,42,56 and 5 as low risk of bias. 12,57–60 Overall, 7 trials reported statistically significant improvements in mood related to palliative care 9,13,48,57–60 ; of these, 4 were at low risk of bias.…”