EGFR and lung cancer: The mutation rate of EGFR gene in the lung cancer patients in each country was 38.1% (mainland China), 48.2% (Hong Kong, China), 53.3% (Taiwan, China), 28.7% (Indonesia), 30.2% (Japan), 35.8% (South Korea), 45.7% (Malaysia), 38.9% (Philippines), 42.9% (Singapore), 45.1% (Thailand), and 36.0% (Vietnam), respectively [14].