It has been stated that all substances have potential toxicity and that all herbs can, therefore be harmful, but most would have to be ingested in impossible amounts to cause harm [ 25].
Officials briefed Huhne, saying: "It is difficult to get assistance in case of pollution problems in such areas, and near impossible to make good damage caused".
Due to the fact that patients who died from any cause was impossible to have event of interest occurred, death from any cause acted as the competing event.
Because the radiation does not go to the marrow, it is biologically impossible for depleted uranium to cause leukemia, said Dr. John Boice, scientific director of the International Epidemiology Institute, a research concern in Rockville, Md., and an expert on radiation and cancer.
They are able to cause apparently impossible things to happen merely because they are no longer confined by the barriers which exist for more ordinary people".
18– 20 And, although the study design makes it impossible to determine cause and effect, these results may suggest that loss of regulatory control of acute or chronic inflammation caused by insufficient oral hygiene, phobia to dental treatment, or asymptomatic under chronic inflammation increase the prevalence of acute inflammation.
At the same time, the central area of the HDSS, where HIV counselling, testing and treatment services are available through the local clinic, seems to have been less severely affected by increasing adult mortality, though again it is impossible to relate cause and effect (8).
This helps avoid the classic problem with the evaluation of aid programs: it's often impossible to separate cause and effect.
It's impossible to disentangle cause and effect, but the revolution in British bookselling, symbolised by the emergence of Waterstone's, played a crucial role in this process.
Though it is impossible to establish cause and effect, Mr. Sorokin went on to unleash a frontal assault on the government.
