Authors: Jeffrey G Linger; Derek R Vardon; Michael T Guarnieri; Eric M Karp; Glendon B Hunsinger; Mary Ann Franden; Christopher W Johnson; Gina Chupka; Timothy J Strathmann; Philip T Pienkos; Gregg T Beckham Journal: Proc Natl Acad Sci U S A Date: 2014-08-04 Impact factor: 11.205