Correction: Experiences of participants of a volunteer-supported walking intervention to improve physical function of nursing home residents – a mixed methods sub-study of the POWER-project - Sabine Weissbach; Anja Rieckert; Christine Kersting; Nina Grede; Norbert Donner-Banzhoff; Andreas Soennichsen; Horst Christian Vollmar; Ina Otte; Pia Weimer; Ulrike Sonja Trampisch (BMC Geriatrics, 2023)