Before revision:   As the system is intended to be used in a large variety of environments and different patients, we train the algorithm using  the large database of spirometry curves which is the NHANES database by the American National Center for Health Statistics.
After revision:  As the system is intended to be used in a large variety of environments and different patients, we train the algorithm using the large database of spirometry curves from the NHANES database by the American National Center for Health Statistics.