Drugs like Ompic have taken the world by storm. In China, biotech companies are developing dozens of similar drugs that can potentially challenge such medical advances in the US and EU. And these aren't just knockoffs.A new exclusive Bloomberg News analysis shows the country is playing a bigger role in coming up with innovative medicines to treat serious diseases like cancer and cardiovascular conditions. Look at China's growing share of the global drug research. Chinese drug makers are now studying way mor ...