PRISMA 2020 Flow

flowchart TD
    A1["Records identified from databases\n(n = 1,284)"] --> A2["Records after duplicates removed\n(n = 1,012)"]
    A2 --> A3["Records screened\n(n = 1,012)"]
    A3 --> A4["Records excluded\n(n = 870)"]
    A3 --> B1["Reports sought for retrieval\n(n = 142)"]
    B1 --> B2["Reports not retrieved\n(n = 6)"]
    B1 --> B3["Reports assessed for eligibility\n(n = 136)"]
    B3 --> B4["Reports excluded:\n- Wrong outcome (52)\n- Wrong population (28)\n- No full text (11)"]
    B3 --> C1["Studies included in review\n(n = 45)"]
    C1 --> C2["Studies included in meta-analysis\n(n = 31)"]