Validation of the Health Index in the Postoperative Period: Use of the Nursing Outcome Classification to Determine the Health Level - Herrero Jaén, S.; González Aguña, A.; Fernández Batalla, M.; Gonzalo de Diego, B.; Sierra Ortega, A.; Rocha Martínez, M.D.M.; Barchino Plata, R.; Jiménez Rodríguez, M.L.; Santamaría García, J.M. (Healthcare (Switzerland), 2024)