Sponsored-by: Chinese Academy of Medical Sciences & Peking Union Medical College Published by: Editorial Office of Acta Academiae Medicinae Sinicae ISSN: 1000-503X CN: 11-2237/R Address:No.9 Dong Dan San Tiao,Beijing PRC Post Code:100730 Tel:010-65105898 E-mail:actacams@263.net.cn QQ: 200642406