1. Department of Thoracic surgery; Fourth People's Hospital of Sichuan Province; Chengdu 610016 China
2. College of Pharmaceutical Sciences; Southwest University; Chongqing 400715 China
3. Department of Pharmacy; The 251 Hospital of People's Liberation Army of China; Zhangjiakou 075000 China
4. Department of Chemistry; Changwon National University; Changwon 641-773 Korea