The above article (Kalligerou et al., Reference Kalligerou, Fieo, Paraskevas, Zalonis, Kosmidis, Yannakoulia, Ntanasi, Dardiotis, Hadjigeorgiou, Sakka and Scarmeas2019) published with an incorrect reference.
The correct reference is as follows:
The Staff of the Benjamin Rose Hospital. (1959). MULTIDISCIPLINARY studies of illness in aged persons. II. A new classification of functional status in activities of daily living. Journal of Chronic Disease, 9, 55–62.
Furthermore, the in-text citation should read (The Staff of the Benjamin Rose Hospital, 1959).
The publisher apologizes for the error.