Neb. Rev. Stat. § 44-2818

No liability shall be imposed upon any health care provider on the basis of an alleged breach of an express or implied contract assuring results to be obtained from any procedure undertaken in the course of health care, unless such contract is expressly set forth in writing and is signed by such health care provider or by an authorized agent of such health care provider. Nothing in this section shall exempt any health care provider from the standard of due care in administering any procedure undertaken.