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| the authors declare no conflict of interest | |||
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| the authors declare that there is no conflict of interest | |||
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| the authors declare that they have no conflict of interest. (If there are no competing interests in their submitted manuscripts, authors should state: "The authors declare that they have no conflict of interest.") | |||
| authors do not have any conflict of interest (стандартная фраза в статьях iwona) | |||