Authors: D Steppenbeck; S Takeuchi; N Aoi; P Doornenbal; M Matsushita; H Wang; H Baba; N Fukuda; S Go; M Honma; J Lee; K Matsui; S Michimasa; T Motobayashi; D Nishimura; T Otsuka; H Sakurai; Y Shiga; P-A Söderström; T Sumikama; H Suzuki; R Taniuchi; Y Utsuno; J J Valiente-Dobón; K Yoneda Journal: Nature Date: 2013-10-10 Impact factor: 49.962