1·Twelve were age 50 or older, with the oldest age 67; another 17 were relative striplings, ages 26 to 40.
研究对象中有12人的年龄在50岁及以上，其中最年长的为67岁。而另外17名研究对象，则相对十分年轻，年龄段从26岁到40岁。