RT Journal Article SR Electronic T1 Ebola vaccine trials raise ethical issues JF Science JO Science FD American Association for the Advancement of Science SP 289 OP 290 DO 10.1126/science.346.6207.289 VO 346 IS 6207 A1 Cohen, Jon A1 Kupferschmidt, Kai YR 2014 UL http://science.sciencemag.org/content/346/6207/289.abstract AB