A Wisconsin-based practice providing independent medical evaluation of disability.

Professional organization representing US occupational physicians. Aims to promote and protect the health of workers through preventive services, clinical care, research, and educational programs.

Primarily a commercial site, with some useful supportive educational material. Offers courses on lung function testing, respiratory protection and fit testing workshop, plus consultancy services.

Multidisciplinary group practice, based in Fredericksburg, Virginia.

Society for doctors providing occupational health services in the workplace, the armed services and academic institutions in the UK.