Retraction of “Impact of Natural Gas Extraction on PAH Levels in Ambient Air”L. Blair Paulik, Carey E. Donald, Brian W. Smith, Lane G. Tidwell, Kevin A. Hobbie, Laurel Kincl, Erin N. Haynes, and Kim A. Andersonpp 7936–7936Publication Date (Web): June 29, 2016 (Retraction)DOI: 10.1021/acs.e