2.2. Treatment and Nutritional Support
Patients received treatment that included medications (antivirals, antibacterial, corticosteroids, etc.), respiratory support, and nutritional support (enteral, parenteral, and/or mixed enteral/parenteral) during the hospital stay. The latter was according to the Clinical Nutrition Units Guidelines of the hospitals, based on the American Society for Parenteral and Enteral Nutrition (ASPEN) and the European Society of Parenteral and Enteral Nutrition (ESPEN) guidelines [