TNF -308 G/A Polymorphism and Risk of Acne Vulgaris: A Meta-Analysis Yang, Jian-Kang ; Wu, Wen-Juan ; Qi, Jue ; He, Li ; Zhang, Ya-Ping Abstract Publication: PLoS ONE Pub Date: February 2014 DOI: 10.1371/journal.pone.0087806 Bibcode: 2014PLoSO...987806Y