Measuring health literacy among older inpatients after elective surgery: evaluation of the European Health Literacy Survey Questionnaire-short form (HLS-EU-Q16) - Moritz Sebastian Schönfeld; Julia Rinke; Cynthia Olotu; Claudia Langebrake; Levente Kriston; Rainer Kiefmann; Corinna Bergelt (Frontiers in Psychology, 2026)