 As a consequence, the impact factor of the journal "Acta Crystallographica Section A" rose from 2.051 in 2008 to 49.926 in 2009, more than "Nature" (at 31.434) and "Science" (at 28.103).The second-most cited article in "Acta Crystallographica Section A" in 2008 only had 28 citations.Additionally, impact factor is a journal metric and should not be used to assess individual researchers or institutions.