MC4R and obesity disorder: 8 Xi Xi B B Chandak Chandak GR GR Shen Shen Y Y Wang Wang Q Q Zhou Zhou D D Association between common polymorphism near the MC4R gene and obesity risk: A systematic review and meta-analysis Association between common polymorphism near the MC4R gene and obesity risk: A systematic review and meta-analysis PLoS One PLoS One 2012 2012 7 7 e45731 e45731 10.1371/journal.pone.0045731 10.1371/journal.pone.0045731 23049848 23049848