Correspondence to: Dr. ZHOU Yu-Jie, Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China (Tel: 86-10-64412431. Fax: 86-10-64443324. Email: yjzhoul 2@sina.com) Correspondence to: Dr. LI Jian-jun, Division of Dyslipidemia, State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China (Tel: 86-10-88396077. Fax: 86-10-68331730. Email: lijnjn@yahoo.com.cn);