Original articles: http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2250.html http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2250.... http://www

Original articles: http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2250.html http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2250.... http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2245.html http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2245.... http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2237.html http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.2237....