(Reuters) – Qualcomm Inc said Chinas price regulator, National Development and Reform Commission (NDRC), has started an investigation of the mobile chipmaker under the Chinese Anti-Monopoly Law. NDRC has advised that the substance of the investigation was confidential, the company said in a statement. Qualcomm said it was not aware of any violation. The NDRC is Chinas top economic planning body and regulates prices. It has launched nearly 20 pricing-related probes into domestic and foreign firms in the last three years, according to official media reports and research published by law firms. …