title: Retraction note: Leisure-time physical activity and the risk of metabolic syndrome: meta-analysis.
authors.affiliation: College of Physical Education, Ludong University, Hongqi Middle Road 186, Zhifu District, Yantai, 264025, Shandong, China. huangyijunhyj@hotmail.com.
authors.forename: Yijun
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Reproductive Medicine Center, Yantai Yuhuangding Hospital, Yantai, 264000, Shandong, China. huangyijunhyj@hotmail.com.
authors.forename: Xuemei
authors.initials: X
authors.lastname: Liu