Correction to: Physical activity and chronic diseases among older people in a mid-size city in China: a longitudinal investigation of bipolar effects

Correction to: BMC Public Health 18, 486 (2018)

https://doi.org/10.1186/s12889-018-5408-7

Following publication of the original article [1], the author identified an error in the affiliation of

• The incorrect affiliation is School of Social Work, Michigan State University, 655 Auditorium Rd., Baker Hall, East Lansing, MI 48824, USA.

• The correct affiliation is: to Harbin Institute of Technology, Shenzhen, China

The author group has been updated above and the original article [1] has been corrected.