Department of Obstetrics and Gynecology, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, USA.
Fertil Steril. 2011 Oct;96(4):817-9. doi: 10.1016/j.fertnstert.2011.09.013.
A decrease in National Institute of Health funding and an increase regulations are significant barriers in conducting research in the United States of America.
美国国立卫生研究院资金减少和法规增加是开展研究的重大障碍。
Zotero 插件