AMD can cause blindness and is known to have both genetic and environmental risk factors.

由于遗传学和环境高危因素原因，AMD会致失明。

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Osteoporosis is a complex disease determined by genetic and environmental risk factors or the interaction of them.

骨质疏松症是一种复杂疾病，由多种遗传和环境风险因子以及它们之间的相互作用决定。

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Its cause is unknown, but a complex mixture of genetic and environmental risk factors is thought to be to blame in many cases.

这种疾病的致病原因未明，但是基因和外部环境不良因素的综合影响被认为是其致病的重要原因。

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But it added there appeared to be a link but the vaccine "is likely to have interacted with genetic or environmental factors which might raise the risk of narcolepsy, and that other factors may have contributed to the results".

BBC: Narcolepsy link to swine flu vaccine investigated