build_bias_specification
                        Build bias specification for Stan
has_duplicates          Check for duplicate values
posterior_mixture       Posterior mixture across studies
posterior_probability   Posterior probability of significance
posterior_summary       Posterior summary statistics
run_appraise_model      Run the appraise Stan model
simulate_bias_priors    Simulate bias priors (xi)
validate_bias_selection
                        Validate bias selections
validate_positive       Validate positivity constraints
