Nurses qualify as expert witnesses. Case in point: Page v. Wilson et als (272 S.E.2d 8 - N.C.).
D000368:Aged; D005104:Expert Testimony; D005260:Female; D006333:Heart Failure / Q000451:nursing*; D006620:Hip Fractures; D006801:Humans; D009657:North Carolina; D009726:Nurses