# Show ULN and LLN reference lines for lab tests

Check this box to display Upper Limit of Normal and Lower Limit of Normal reference lines on the plots for laboratory findings tests.

If multiple measurements are recorded for the ULN (the LBSTNRHI variable) per laboratory test, then the Maximum ULN value is shown.

If multiple measurements are recorded for the LLN (the LBSTNRLO variable) per laboratory test, then the Minimum LLN value is shown.

### To Specify This Option:

| 8 | Click within the check box.