Authors: Patrick Gerland; Adrian E Raftery; Hana Sevčíková; Nan Li; Danan Gu; Thomas Spoorenberg; Leontine Alkema; Bailey K Fosdick; Jennifer Chunn; Nevena Lalic; Guiomar Bay; Thomas Buettner; Gerhard K Heilig; John Wilmoth Journal: Science Date: 2014-09-18 Impact factor: 47.728