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Table 2 PICOS approach in our systematic review according to the PRISMA guideline[26]

From: Evidence for the use of Levomepromazine for symptom control in the palliative care setting: a systematic review

P patients patients at the end of life
I intervention pharmacological treatment with levomepromazine
C comparison none
O outcome symptom control with levomepromazine
S study design randomized controlled trials, prospective trials, cohort studies, case series, case reports, systematic reviews