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Effects of psychosocial support interventions on survival in inpatient and outpatient healthcare settings: A meta-analysis of 106 randomized controlled trials. 

Smith TB, Workman C, Andrews C, Barton B, Cook M, Layton R, et al. (2021) 

PLoS Med 18(5): e1003595. doi.org/10.1371/journal.pmed.1003595

https://journals.plos.org/plosmedicine/article?id=10.1371/journal.pmed.1003595