Malnutrition risk in elective surgery patients and effectiveness of preoperative nutritional interventions at a pre-anaesthetic clinic: a 4-year apart, single-centre, observational study - Paweł Kutnik; Oksana Wichowska; Justyna Sysiak-Sławecka; Marta Szczukocka; Elżbieta Rypulak; Paweł Piwowarczyk; Michał Borys; Mirosław Czuczwar (Anaesthesiology Intensive Therapy, 2023)