首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1275310篇
  免费   94216篇
  国内免费   1984篇
耳鼻咽喉   18186篇
儿科学   42266篇
妇产科学   37816篇
基础医学   187024篇
口腔科学   35381篇
临床医学   108119篇
内科学   251457篇
皮肤病学   26497篇
神经病学   99174篇
特种医学   49982篇
外国民族医学   366篇
外科学   197699篇
综合类   26517篇
现状与发展   1篇
一般理论   300篇
预防医学   92585篇
眼科学   29056篇
药学   97763篇
  1篇
中国医学   2498篇
肿瘤学   68822篇
  2018年   11823篇
  2015年   11615篇
  2014年   15998篇
  2013年   24357篇
  2012年   33555篇
  2011年   35950篇
  2010年   21214篇
  2009年   20023篇
  2008年   34986篇
  2007年   37951篇
  2006年   38511篇
  2005年   37814篇
  2004年   36389篇
  2003年   35377篇
  2002年   34929篇
  2001年   58105篇
  2000年   59600篇
  1999年   50704篇
  1998年   14233篇
  1997年   12811篇
  1996年   13071篇
  1995年   12345篇
  1994年   11757篇
  1993年   10861篇
  1992年   40989篇
  1991年   40359篇
  1990年   39886篇
  1989年   38707篇
  1988年   36108篇
  1987年   35349篇
  1986年   33724篇
  1985年   32135篇
  1984年   23922篇
  1983年   20818篇
  1982年   12377篇
  1981年   10928篇
  1980年   10204篇
  1979年   22636篇
  1978年   15879篇
  1977年   13729篇
  1976年   12970篇
  1975年   14203篇
  1974年   16682篇
  1973年   16080篇
  1972年   15318篇
  1971年   14230篇
  1970年   13214篇
  1969年   12733篇
  1968年   11979篇
  1967年   10478篇
排序方式: 共有10000条查询结果,搜索用时 875 毫秒
131.
Conclusion: Recurrent respiratory papillomatosis (RRP) patients with high surgical treatment frequency (≥ 1/year, HF) were significantly younger and had a more widespread laryngeal disease compared to a low frequency treated group (< 1 treatment/year, LF). This study confirms the existence of a clinical RRP group, not primarily related to HPV sub-type, but more care-intensive and in need of more vigilant follow-up. Objectives: RRP is associated with high morbidity due to its influence on breathing and voice. The purpose of this study was to characterize RRP patients in northern Sweden and investigate possible predictor factors affecting therapeutic needs. Method: Patients from the regional referral area (northern Sweden) were categorized for age, disease duration, juvenile or adult onset, profile of disease development, number of surgical sessions in relation to disease duration, laryngeal deposition of papilloma, gender, and HPV sub-types, in order to identify patients with increased need for frequent surgical treatment. Results: The median age of the RRP patients (n = 48) was 44.5 years; 34 (71%) were males and 14 (29%) females, most were infected with HPV 6. Patients with high surgical treatment frequency/year were significantly younger and showed more widespread papillomatous vegetation in the larynx, compared to the low frequency treated group.  相似文献   
132.
133.
134.
135.
136.
Infantile hemangiomas (IHs) are the most common benign tumor of infancy, characterized by a natural history of early proliferation in the first months of life to eventual involution during childhood, often with residual fibrofatty tissue. Once involution has been achieved, IHs do not typically recur. We present two cases of exogenous growth hormone therapy resulting in the recurrence of IHs in late childhood, supported by radiological, immunohistochemical, in vitro, and in vivo evidence.  相似文献   
137.
138.
139.
140.

Aims

Variations of the anatomy of donor hepatic arteries increase the number of arterial anastomoses during liver transplantation and, possibly, the incidence of hepatic artery thrombosis (HAT). In this study, we describe the arterial anatomic variations in liver grafts procured and transplanted by a single center in Greece, the techniques of arterial anastomosis, and their effect on the incidence of early HAT.

Materials and Methods

From January 2013 to December 2017, the arterial anatomy of 116 grafts procured for liver transplantation were recorded, as well as the technique of arterial anastomosis and the incidence of early hepatic artery thrombosis (HAT <30 days).

Results

A single hepatic artery was recorded in 72.41% of the procured grafts, an aberrant left hepatic artery (accessory or replaced) in 18 grafts (15.52%), and an aberrant right hepatic artery (accessory or replaced) in 17 grafts (14.66%), while other variations were observed in less than 1% of the procured livers. Of the 116 primary liver transplantations, 6 patients (5.17%) developed early HAT <30 days. Two of these patients (1.72%) had 1 anastomosis of the hepatic artery and 4 (3.45%) had 2 anastomoses due to anatomic variations.

Conclusions

Anatomic variations of the hepatic artery in liver grafts is a common finding and increase the incidence of early HAT but not to a degree to make these grafts unusable.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号