Elmer McCollum
... that Elmer McCollum and Marguerite Davis discovered vitamin A three weeks before Osborne and Mendel?
... that <b id="mwAkw"><a href="./Elmer_McCollum" id="mwAk0" rel="mw:WikiLink" title="Elmer McCollum">Elmer McCollum</a></b> <i id="mwAk4">(pictured)</i> and <a href="./Marguerite_Davis" id="mwAk8" rel="mw:WikiLink" title="Marguerite Davis">Marguerite Davis</a> discovered <a href="./Vitamin_A" id="mwAlA" rel="mw:WikiLink" title="Vitamin A">vitamin A</a> three weeks before <a href="./Thomas_Burr_Osborne_(chemist)" id="mwAlE" rel="mw:WikiLink" title="Thomas Burr Osborne (chemist)">Osborne</a> and <a href="./Lafayette_Mendel" id="mwAlI" rel="mw:WikiLink" title="Lafayette Mendel">Mendel</a>?