Effect of Folic Acid Supplementation on Cardiovascular Outcomes: A Systematic Review and Meta-Analysis Zhou, Yu-Hao ; Tang, Jian-Yuan ; Wu, Mei-Jing ; Lu, Jian ; Wei, Xin ; Qin, Ying-Yi ; Wang, Chao ; Xu, Jin-Fang ; He, Jia Abstract Publication: PLoS ONE Pub Date: September 2011 DOI: 10.1371/journal.pone.0025142 Bibcode: 2011PLoSO...625142Z