例如﹕阿氏早老年痴呆症协会(Alzheimer's Disease Association)不认为阿氏症为一种精神病，尽管从生物学意义上讲这是一种大脑疾病。
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老年痴呆症协会 Alzheimer's Association
荷兰老年痴呆症协会 Alzheimer Nederland
加拿大老人痴呆症协会 Alzheimer Society of Canada
据国际老年痴呆症协会数字显示，中国患者数量世界最多，已达600万左右。
China has about 6m dementia patients, said to be the highest number in the world, according to statistics from Alzheimer's Disease International.
到2050年，按照老年痴呆症协会的说法，1100万到1600万美国人将患上此病。
By 2050, according to the Alzheimer's Association, 11 million to 16 million Americans will have the disease.
老年痴呆症协会对这项研究表示欢迎，不过同时表示，这项技术是否真正有效，还需要更多的研究观察。
The Alzheimer's Society welcomed the findings but said more research was needed to see if the method would be effective.
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