全文获取类型
收费全文 | 2449682篇 |
免费 | 172396篇 |
国内免费 | 4813篇 |
专业分类
耳鼻咽喉 | 33016篇 |
儿科学 | 80083篇 |
妇产科学 | 67027篇 |
基础医学 | 349060篇 |
口腔科学 | 70939篇 |
临床医学 | 221419篇 |
内科学 | 469857篇 |
皮肤病学 | 55751篇 |
神经病学 | 189675篇 |
特种医学 | 93436篇 |
外国民族医学 | 437篇 |
外科学 | 369765篇 |
综合类 | 53940篇 |
现状与发展 | 5篇 |
一般理论 | 761篇 |
预防医学 | 180111篇 |
眼科学 | 57964篇 |
药学 | 185091篇 |
13篇 | |
中国医学 | 6179篇 |
肿瘤学 | 142362篇 |
出版年
2021年 | 18337篇 |
2019年 | 18998篇 |
2018年 | 27563篇 |
2017年 | 21184篇 |
2016年 | 23544篇 |
2015年 | 26638篇 |
2014年 | 36756篇 |
2013年 | 53834篇 |
2012年 | 74223篇 |
2011年 | 78234篇 |
2010年 | 46388篇 |
2009年 | 43349篇 |
2008年 | 72474篇 |
2007年 | 77351篇 |
2006年 | 77997篇 |
2005年 | 74568篇 |
2004年 | 71709篇 |
2003年 | 68495篇 |
2002年 | 65969篇 |
2001年 | 127915篇 |
2000年 | 130927篇 |
1999年 | 108586篇 |
1998年 | 28420篇 |
1997年 | 24857篇 |
1996年 | 24943篇 |
1995年 | 23838篇 |
1994年 | 21754篇 |
1993年 | 20339篇 |
1992年 | 82008篇 |
1991年 | 79098篇 |
1990年 | 76877篇 |
1989年 | 73781篇 |
1988年 | 67079篇 |
1987年 | 65354篇 |
1986年 | 61775篇 |
1985年 | 58546篇 |
1984年 | 42891篇 |
1983年 | 36501篇 |
1982年 | 20499篇 |
1979年 | 38174篇 |
1978年 | 26251篇 |
1977年 | 22833篇 |
1976年 | 20714篇 |
1975年 | 22527篇 |
1974年 | 26915篇 |
1973年 | 25937篇 |
1972年 | 24235篇 |
1971年 | 22620篇 |
1970年 | 20926篇 |
1969年 | 19785篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
31.
32.
33.
A. Ríos A.I. López-Navas M.A. Ayala G. Garrido M.J. Sebastián J. Carrillo Á. Sánchez J. Flores-Medina J.J. Ruiz-Manzanera A.M. Hernández P. Ramírez P. Parrilla 《Transplantation proceedings》2019,51(2):258-260
The Latin American population has a double way of immigration, one toward the United States by proximity and another toward Spain by sociocultural affinity. This population increase is affecting organ donation and transplantation in receiving countries.
Objective
To analyze the brain death (BD) concept knowledge in the Dominican Republic immigrant population in Florida (United States) and Spain.Method
Population under study: Population born in the Dominican Republic, resident in Florida (United States) and in Spain. Inclusion criteria: Population older than 15 years stratified by age and sex. Assessment instrument: Donation attitude questionnaire PCID-DTO-Ríos. Fieldwork: Random selection based on stratification. Immigration support association collaboration in Florida and Spain was needed to locate potential respondents. Completion was anonymous and self-administered, with verbal consent.Results
A total of 123 respondents, 57 residents in Spain and 66 in Florida, have been included in the study. The 27% (n = 33) of the respondents knowledgeable of the BD concept consider it the death of an individual. Of the remainder, 52% (n = 64) do not know about it, and the remaining 21% (n = 26) believe it does not mean the death of a patient. No differences were observed regarding migration countries (P > .05). There was no association of the BD concept with other psychosocial factors analyzed or with the attitude toward organ donation.Conclusions
Knowledge of the BD concept among the Dominican immigrant population is similar in Spain and Florida, and, unlike most studies, there is no objective association with the attitude toward organ donation. 相似文献34.
35.
36.
37.
38.
39.
Dr. H. Ptok R. Steinert F. Meyer K.-P. Kröll C. Scheele F. Köckerling I. Gastinger H. Lippert 《Der Chirurg》2006,77(8):709-717
BACKGROUND: The laparoscopic resection of rectal cancer shows morbidity and oncological safety comparable to the open approach, but morbidity increases after conversion to open resection. No oncological long-term results are available for the latter patients. METHODS: From 01/01/2000-31/12/2002, patients with curatively resected rectal cancer enrolled in a observational study were evaluated for morbidity, mortality, tumor- and local recurrence rate, paying attention to patients with conversion from laparoscopic to open resection. RESULTS: 237 (3.3%) of 7,189 patients underwent laparoscopic resection (ITT). These patients showed significantly more T1/2 tumors (P<0.001) in earlier UICC stages (P<0.001) than open resected patients. 35 (14.8%) of 237 laparoscopic procedures were converted. Compared with patients receiving complete laparoscopic or open resection, these patients showed significantly higher frequencies of intraoperative (P<0.001) and general postoperative complications (P=0.003) as well as the highest overall morbidity (P=0.031). After a median follow-up of 30.1 months, the highest 5-year local recurrence rate was found in the converted group (16.0%). The laparoscopically resected patients showed a local recurrence rate of 3.3%, patients with open resection of 12.4% (P=0.082). The disease-free survival rate did not differ between the groups (P=0.585). CONCLUSION: Laparoscopic resection of rectal cancer provides oncological results similar to open resection. After conversion, the short and oncological long-term outcomes were worse. Considering a conversion rate of 15%, only a strict indication for the laparoscopic approach can be allowed, and laparoscopic resection should be performed at centers. 相似文献
40.