Liu Jung-sen, attending surgeon in thoracic surgery at Cathay General Hospital, points out that the lung cancer rate among women in Xiong County in China's Hebei Province, who cook with coal in their cave dwellings, is eight times as high as in other regions.
國泰醫院胸腔外科主治醫師劉榮森以大陸河北省熊縣地區為例指出，該地的婦女在窯洞中以生煤煮食，因此女性罹患肺癌的比例是其他地區的八倍。