1. Center for Fire, Rescue & EMS Health Research, NDRI-USA, Inc., Leawood, KS 66224, USA
2. National Center for PTSD, White River Junction, VT 05009, USA
3. FDNY, Counseling Services Unit, Fort Totten, NY 10314, USA
4. KCMO Fire Department, Kansas City, MO 64106, USA