Authors: C Sugimoto; T Kitamura; J Guo; M N Al-Ahdal; S N Shchelkunov; B Otova; P Ondrejka; J Y Chollet; S El-Safi; M Ettayebi; G Grésenguet; T Kocagöz; S Chaiyarasamee; K Z Thant; S Thein; K Moe; N Kobayashi; F Taguchi; Y Yogo Journal: Proc Natl Acad Sci U S A Date: 1997-08-19 Impact factor: 11.205