全文获取类型
收费全文 | 41577篇 |
免费 | 2192篇 |
国内免费 | 146篇 |
专业分类
耳鼻咽喉 | 532篇 |
儿科学 | 2600篇 |
妇产科学 | 761篇 |
基础医学 | 4914篇 |
口腔科学 | 1139篇 |
临床医学 | 3020篇 |
内科学 | 7592篇 |
皮肤病学 | 1175篇 |
神经病学 | 2421篇 |
特种医学 | 1208篇 |
外科学 | 6257篇 |
综合类 | 1330篇 |
一般理论 | 19篇 |
预防医学 | 2123篇 |
眼科学 | 1473篇 |
药学 | 4127篇 |
1篇 | |
中国医学 | 357篇 |
肿瘤学 | 2866篇 |
出版年
2023年 | 350篇 |
2022年 | 998篇 |
2021年 | 1698篇 |
2020年 | 928篇 |
2019年 | 1021篇 |
2018年 | 1438篇 |
2017年 | 1046篇 |
2016年 | 1381篇 |
2015年 | 1397篇 |
2014年 | 2019篇 |
2013年 | 2314篇 |
2012年 | 3277篇 |
2011年 | 3189篇 |
2010年 | 1919篇 |
2009年 | 1496篇 |
2008年 | 2138篇 |
2007年 | 2183篇 |
2006年 | 1957篇 |
2005年 | 1758篇 |
2004年 | 1626篇 |
2003年 | 1384篇 |
2002年 | 1191篇 |
2001年 | 801篇 |
2000年 | 720篇 |
1999年 | 612篇 |
1998年 | 274篇 |
1997年 | 219篇 |
1996年 | 230篇 |
1995年 | 200篇 |
1994年 | 161篇 |
1993年 | 135篇 |
1992年 | 370篇 |
1991年 | 347篇 |
1990年 | 368篇 |
1989年 | 336篇 |
1988年 | 289篇 |
1987年 | 250篇 |
1986年 | 242篇 |
1985年 | 235篇 |
1984年 | 183篇 |
1983年 | 127篇 |
1982年 | 69篇 |
1981年 | 78篇 |
1980年 | 69篇 |
1979年 | 112篇 |
1978年 | 71篇 |
1977年 | 89篇 |
1976年 | 67篇 |
1973年 | 64篇 |
1971年 | 61篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
961.
Keats JJ Chesi M Egan JB Garbitt VM Palmer SE Braggio E Van Wier S Blackburn PR Baker AS Dispenzieri A Kumar S Rajkumar SV Carpten JD Barrett M Fonseca R Stewart AK Bergsagel PL 《Blood》2012,120(5):1067-1076
Emerging evidence indicates that tumors can follow several evolutionary paths over a patient's disease course. With the use of serial genomic analysis of samples collected at different points during the disease course of 28 patients with multiple myeloma, we found that the genomes of standard-risk patients show few changes over time, whereas those of cytogenetically high-risk patients show significantly more changes over time. The results indicate the existence of 3 temporal tumor types, which can either be genetically stable, linearly evolving, or heterogeneous clonal mixtures with shifting predominant clones. A detailed analysis of one high-risk patient sampled at 7 time points over the entire disease course identified 2 competing subclones that alternate in a back and forth manner for dominance with therapy until one clone underwent a dramatic linear evolution. With the use of the Vk*MYC genetically engineered mouse model of myeloma we modeled this competition between subclones for predominance occurring spontaneously and with therapeutic selection. 相似文献
962.
963.
964.
965.
966.
We describe a new technique wherein we have used the Ionescu Ross Wooler stent for housing the pulmonary autograft. We believe that this technique is easy and reproducible and offers many advantages over the previously described techniques. 相似文献
967.
968.
969.
There is paucity of literature on the relation of obesity with recurrent and chronic pancreatitis. We recorded the clinical details and the outcome of five patients with recurrent pancreatitis who had components of the metabolic syndrome. Their age ranged from 8 to 20 years. All five patients had acanthosis nigricans. Body mass index (BMI) could not be evaluated as these patients lost weight following episodes of pancreatitis. Three patients had two or more first-degree relatives who had diabetes mellitus. Only one patient had severe necrotizing pancreatitis. Coexisting liver disease was seen in two patients. Elevated serum cholesterol levels and moderately elevated serum triglycerides along with elevated serum amylase levels observed in these patients suggest possibility of a different mechanism from that of hypertriglyceridemia-related pancreatitis. Evaluation of pancreatic steatosis should be considered in patients with pancreatitis in the setting of metabolic syndrome. 相似文献
970.
Ajit Sood Shiv Kumar Sarin Vandana Midha Syed Hissar Neena Sood Pankaj Bansal Manu Bansal 《Indian journal of gastroenterology》2012,31(5):232-236