German translation and psychometric testing of the Postconcussion Symptom Inventory for adolescents in self-report (PCSI-SR13) and parent-report (PCSI-P) - Dagmar A. Timmermann; Marina Zeldovich; Ugne Krenz; Ivana Holloway; Katrin Cunitz; Inga K. Koerte; Anna Buchheim; Christel Salewski; Gerard A. Gioia; Nicole von Steinbuechel (PLoS ONE, 2025)