Characteristics of study participants of both cross-sectional and longitudinal gene associated studies among a Chinese Aged Population Sample. YangJinghui LiuJianwei LiuJing LiWenyuan LiXiaoying HeYao YeLing 2014 <p>The results are presented as mean ± SD or N (%).</p><p>*statistically significant.</p><p>doi:10.1371/journal.pone.0100548.t001</p>