U.S. Geological Survey environmental health science strategy — Providing environmental health science for a changing world - Bright, Patricia; Buxton, Herbert; Balistrieri, Laurie; Barber, Larry; Chapelle, Francis; Cross, Paul; Krabbenhoft, David; Plumlee, Geoffrey; Sleeman, Jonathan; Tillitt, Donald; Toccalino, Patricia L.; Winton, James (Circular, 2013)