LAB_DETAILS             Available lab names
hemoglobin_data         Example values of Hemoglobin and Creatinine
ln_convert_units        Convert values to the default units for the lab
ln_download_data        Download high-resolution reference
                        distributions
ln_lab_units            Get available units for a lab
ln_normalize            Normalize lab values to age and sex
ln_plot_dist            Plot age-sex distribution of a lab
ln_quantile_value       Compute the lab value for a given quantile
