[1] Peking Univ, Hosp 1, Dept Pediat, Beijing 100034, Peoples R China
[2] Peking Univ, Hlth Sci Ctr, Dept Clin Med, Beijing 100191, Peoples R China
[3] Univ Calif San Diego, Dept Biochem & Cellular Biol, La Jolla, CA 92093 USA
[4] Minist Educ, Key Lab Mol Cardiovasc Sci, Beijing 100191, Peoples R China