Data for Difference Between Means, Standard Differences, and Log Ratios of Means :
    - Each row from a separate study
    - All rows have 6 columns
    - Column 1, 2, and 3 = n, mean, Standard Deviation of index (treatment) group
    - Column 4, 5, and 6 = n, mean, Standard Deviation of reference (control) group
Data for Risk Differences, Log(Risk Ratio)s, and Log(Odds Ratio)s :
    - Each row from a separate study
    - All rows have 4 columns
    - Column 1 and 2 = numbers with positive attributes in index and reference group (pos1,pos2)
    - Column 3 and 4 = numbers with negative attributes in index and reference group (neg1,neg2)
Data for Correlation Coefficients :
    - Each row from a separate study
    - All rows have 2 columns
    - Column 1 = sample size (n)
    - Column 2 = Correlation Coefficient (ρ)