The study appears in the April issue of the Journal of the American Geriatrics Society and was led by Dr. Michael Irwin of the University of California, Los Angeles.

由来自加州大学洛杉矶分校的迈克尔·欧文博士领导的这项研究，刊登在四月号的《美国老年社会杂志》上。

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Dr Michael Irwin said she had been "wonderful and jovial".

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"We take this incident extremely seriously and would like to reassure consumers that we have taken rigorous steps to ensure this problem does not occur again, " said Michael Murphy, Irwin's commercial controller.

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