I. Introduction
Lung cancer is regarded as one of the most prominent cancers in the whole wide world. It makes up around 25% of all cancer related deaths [1]. The most common reason behind lung cancer is smoking. However, in the case of non-smokers, exposure to radon, second-hand smoking, air pollution, or certain other substances can all cause lung cancer [2]. Unfortunately, the mortality rate of lung cancer is on the rise and it is supposed to become about 17 million worldwide in the year 2030 [3]. In case of developing countries, at the current growth rate, people's odds of acquiring cancer during their lifespan may rise up to 50%-60% by 2050 [4].