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   539683篇
  免费   36195篇
  国内免费   639篇
耳鼻咽喉   7227篇
儿科学   17800篇
妇产科学   14163篇
基础医学   88202篇
口腔科学   15018篇
临床医学   47792篇
内科学   98293篇
皮肤病学   12568篇
神经病学   38767篇
特种医学   19384篇
外国民族医学   63篇
外科学   80417篇
综合类   9080篇
一般理论   164篇
预防医学   41943篇
眼科学   12603篇
药学   42496篇
  2篇
中国医学   1036篇
肿瘤学   29499篇
  2018年   5326篇
  2016年   4411篇
  2015年   4899篇
  2014年   6650篇
  2013年   10432篇
  2012年   13991篇
  2011年   15535篇
  2010年   9014篇
  2009年   8292篇
  2008年   14804篇
  2007年   15914篇
  2006年   16154篇
  2005年   15497篇
  2004年   15187篇
  2003年   14359篇
  2002年   14194篇
  2001年   24936篇
  2000年   25969篇
  1999年   21264篇
  1998年   5695篇
  1997年   4953篇
  1996年   5255篇
  1995年   4845篇
  1994年   4516篇
  1992年   16373篇
  1991年   16972篇
  1990年   17036篇
  1989年   16367篇
  1988年   15141篇
  1987年   14934篇
  1986年   14123篇
  1985年   13487篇
  1984年   10031篇
  1983年   8633篇
  1982年   4813篇
  1981年   4470篇
  1979年   9824篇
  1978年   7152篇
  1977年   6029篇
  1976年   5833篇
  1975年   6614篇
  1974年   7921篇
  1973年   7378篇
  1972年   7186篇
  1971年   6905篇
  1970年   6364篇
  1969年   6069篇
  1968年   5711篇
  1967年   5150篇
  1966年   4584篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Kinase alterations are increasingly recognised as oncogenic drivers in mesenchymal tumours. Infantile fibrosarcoma and the related renal tumour, congenital mesoblastic nephroma, were among the first solid tumours shown to harbour recurrent tyrosine kinase fusions, with the canonical ETV6::NTRK3 fusion identified more than 20 years ago. Although targeted testing has long been used in diagnosis, the advent of more robust sequencing techniques has driven the discovery of kinase alterations in an array of mesenchymal tumours. As our ability to identify these genetic alterations has improved, as has our recognition and understanding of the tumours that harbour these alterations. Specifically, this study will focus upon mesenchymal tumours harbouring NTRK or other kinase alterations, including tumours with an infantile fibrosarcoma-like appearance, spindle cell tumours resembling lipofibromatosis or peripheral nerve sheath tumours and those occurring in adults with a fibrosarcoma-like appearance. As publications describing the histology of these tumours increase so, too, do the variety kinase alterations reported, now including NTRK1/2/3, RET, MET, RAF1, BRAF, ALK, EGFR and ABL1 fusions or alterations. To date, these tumours appear locally aggressive and rarely metastatic, without a clear link between traditional features used in histological grading (e.g. mitotic activity, necrosis) and outcome. However, most of these tumours are amenable to new targeted therapies, making their recognition of both diagnostic and therapeutic import. The goal of this study is to review the clinicopathological features of tumours with NTRK and other tyrosine kinase alterations, discuss the most common differential diagnoses and provide recommendations for molecular confirmation with associated treatment implications.  相似文献   
2.
3.
Maternal and Child Health Journal - Early life exposures can have an impact on a child’s developmental trajectory and children born late preterm (34–36 weeks gestational age)...  相似文献   
4.
5.
6.
7.
8.
9.
10.
Academic output is just one aspect of a successful career as a plastic surgeon. However, for those with a strong interest in academia, the academic output of a department will likely be a key factor when deciding how to rank jobs. The aim of this study was to quantify and rank the academic output of plastic surgery units across the UK and Ireland. The Institute for Scientific Information (ISI) Web of Science Bibliometric analysis tool was used to collate cumulative (1950–2016), 10 year (2006–2016) and 3 years (2013–2015) research output data for plastic surgery units in the UK and Ireland. Sixty-six plastic surgery units were identified. Departments were ranked for each time period according to the number of papers produced, number of citations (Nc) and h-index (a measure of the impact of scientific output). The top 3 departments for number of papers in the last 10 years were The Royal Free Hospital, London (226) Broomfield Hospital, Chelmsford (218), and Morriston Hospital and Swansea (188). The top 3 for h-number were The Royal Free Hospital (21) Wythenshawe Hospital, Manchester (18) and Morriston Hospital (17). Academic output varies across plastic surgery units in the UK and Ireland. A number of departments have consistently maintained high academic outputs across the years and will be of interest to surgeons hoping to pursue a career in academia.  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