LLN_GLI                 Calculate LLN of spirometry parameters using
                        GLI-2012 equations
LLN_NHANES3             Calculate predicted values of spirometry
                        parameters using NHANES III equations
pctpred_GLI             Convert spirometric values to % predicted using
                        GLI-2012 equations
pctpred_NHANES3         Convert spirometric values to % predicted using
                        NHANES III equations
pred_GLI                Calculate predicted values of spirometry
                        parameters using GLI-2012 equations
pred_NHANES3            Calculate predicted values of spirometry
                        parameters using NHANES III equations
rspiro-package          rspiro: Brief overview of the package
zscore_GLI              Convert spirometric values to z-scores using
                        GLI-2012 equations
