http://www.chestjournal.org/cgi/content/full/127/3/936?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=1&andorexacttitle=and&andorexacttitleabs=and&fulltext=Potassium+Dichromate+&andorexactfulltext=phrase&searchid=1&FIRSTINDEX=0&sortspec=relevance&resourcetype=HWCIT