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http://www.nature.com/news/don-t-edit-the-human-germ-line-1.17111
http://www.nature.com/news/scientists-sound-alarm-over-dna-editing-of-human-embryos-1.17110
http://www.biopoliticaltimes.org/article.php?id=8235
http://www.cell.com/cell/abstract/S0092-8674(14)00079-8
http://elpais.com/elpais/2015/03/20/ciencia/1426873549_891160.html