汉森制药：公司的研发情况请参考公司定期报告

Group 1 - The core viewpoint of the article is that Hansen Pharmaceutical (002412) has addressed investor inquiries regarding its research and development status, indicating that detailed information can be found in the company's periodic reports [1] Group 2 - The company encourages investors to refer to its regular reports for comprehensive insights into its R&D activities [1]