...before acting. The fact that all scientific work is subject to revision in light of advancing knowledge does not confer upon us a freedom to ignore the knowledge we already have, or to postpone action when knowledge appears to demand it at a given time. Air pollution control technology is available...

...causation available. This philosophy was appropriately expressed by Sir AB Hill ( 1962) when he wrote : "All scientific work is incomplete — whether it...knowledge we already have, or to postpone the action that it appears to demand at a given time." The lessons of the past in general health and safety practices...

...for lead free gasoline, and lead-free lungs.7 C. Several decisive actions are required without delay All scientific work is incomplete — whether it be...knowledge we already have, or to postpone the action that it appears to demand at a given time (Hill, 1965). At best, knowledge of the scientific and medical...

...Hill, who is one of the great leaders of the world in public health statistics. At that time he said : All scientific work Is incomplete, whether it be observational...advancing knowledge. That does not confer upon us the freedom to ignore the knowledge we already have or to postpone the action that it appears to demand...

...emphatically that this does not imply crossing every V and swords with every critic l>efore we act. "All scientific work is incomplete — whether it...knowledge we already have, or to postpone the action that it appears to demand at a given time."* These quotations provide satisfying support of my view...

...'t' and swords with every critic before we act. "All scientific work is incomplete — whether ¡t be observational or experimental. All scientific work...knowledge we already have, or to postpone the action that it appears to demand at a given time."* These quotations provide satisfying support of my view...

...appropriately expressed by Sir EB Hill, 1962, when he wrote: "All scientific work is incomplete-whether it be observational or experimental. All scientific...advancing knowledge. That does not confer upon us freedom to lower the knowledge we already have, or to postpone the action that it appears to demand...

...a complete understanding of the disease or its biologic mechanism. As Bradford Hill [14] cautioned: "All scientific work is incomplete — whether it...liable to be upset or modified by advancing knowledge. This does not confer upon us a freedom to ignore the knowledge we already have, or to postpone the...

...our knowledge, the existing evidence cannot be set aside to await absolute answers. As Hill stated, "All scientific work is liable to be upset or modified...knowledge we already have , or to postpone the action that it appears to demand at a given time." (Hill, 1983) The exigencies of public health problems require...

...about that sort of thing. This is Dr. Bradford Hill: "All scientific work is incomplete, whether it may be observational or experimental. All scientific work...advancing knowledge. That does not confer upon us the freedom to ignore the knowledge we already have or to postpone the action that it appears to demand...