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The intensive research has shown that the drug has many side-effects and therefore has to be eliminated from use. |
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It has been proved by the intensive research that the drug has several side-effects; as a result it has been banned. |
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Intensive research was carried out as to whether the drug had any side-effects or not, and in the end, it was completely eliminated from use. |
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After intensive research, the drug has been found to produce many side-effects and has been totally eliminated from use. |
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The drug, which was found to have many side-effects after intensive research was eliminated from use. |