by American Medical Association.;

by Massachusetts Medical Society.;

by Society of Critical Care Medicine.;

by American Congress of Rehabilitation Medicine.; American Congress of Physical Medicine and Rehabilitation.; American Academy of Physical Medicine and Rehabilitation.; American Society of Physical Medicine and Rehabilitation.;

by American College of Sports Medicine.;

by American Orthopaedic Society for Sports Medicine.;

by American College of Emergency Physicians.; University Association for Emergency Medicine.;

by Association of Professors of Medicine (Washington, D.C.);

by Interstate Postgraduate Medical Association of North America.;