https://pubmed.ncbi.nlm.nih.gov/12622580/

Royal S, Smeaton L, Avery AJ, Hurwitz B, Sheikh A. Interventions in primary care to reduce medication related adverse events and hospital admissions: systematic review and meta-analysis. Qual Saf Health Care. 2006;15(1):23–31. 

 Thomas R, Huntley AL, Mann M, et al. Pharmacist-led interventions to reduce unplanned admissions for older people: a systematic review and meta-analysis of randomised controlled trials. Age Ageing. 2014;43(2):174–187.

https://pubmed.ncbi.nlm.nih.gov/12061133/ (US 80 %)

From the netherland (50%) https://bmchealthservres.biomedcentral.com/articles/10.1186/1472-6963-11-4