Chinese doctors report the world's tallest woman is walking again after spending a month in the hospital to treat complications of her gigantism. Yao Defen, who is just over 7 1/2 feet tall, has a number of medical problems resulting from a benign tumor on her pituitary gland that makes it secrete excessive amounts of growth hormone, the Shanghai Daily said Friday. Yao, 36, gained most of her height during childhood, and while her body still produces excess hormone, doctors think she won't continue to grow. "She has shown good responses to medicines we used on her tumor, which is...