Mental health indicators associated with oil spill response and clean-up: cross-sectional analysis of the GuLF STUDY cohort oleh Richard K Kwok, PhD, John A McGrath, MA, Sarah R Lowe, PhD, Lawrence S Engel, PhD, W Braxton Jackson, 2nd, MPH, Matthew D Curry, MA, Julianne Payne, PhD, Sandro Galea, Prof, MD, Dale P Sandler, Prof, PhD