http://www.cell.com/trends/molecular-medicine/abstract/S1471-4914(14)00101-4
Carl Zimmer
http://mosaicscience.com/story/why-do-we-have-blood-types
http://www.nature.com/ng/journal/vaop/ncurrent/full/ng.3036.html
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4076789/