Correction to: BMC Geriatr 21, 532 (2021)

https://doi.org/10.1186/s12877-021-02488-0

During the publication process of the original article [1] the following contribution statement was accidentally omitted:

– Yinan Zhao and Lulu Liao equally contributed to this work.

The publisher apologizes for the inconvenience caused. The original article [1] has been updated.