Versions of Nebraska Statutes 71-423.01. Mental illness, defined on LawServer 2023 Nebraska Statutes 71-423.01. Mental illness, defined 2022 Nebraska Statutes 71-423.01. Mental illness, defined 2021 Nebraska Statutes 71-423.01. Mental illness, defined 2019 Nebraska Statutes 71-423.01. Mental illness, defined 2018 Nebraska Statutes 71-423.01. Mental illness, defined