全文获取类型
收费全文 | 191039篇 |
免费 | 35137篇 |
国内免费 | 2506篇 |
专业分类
耳鼻咽喉 | 5590篇 |
儿科学 | 6395篇 |
妇产科学 | 2895篇 |
基础医学 | 8516篇 |
口腔科学 | 1927篇 |
临床医学 | 30947篇 |
内科学 | 55367篇 |
皮肤病学 | 7850篇 |
神经病学 | 18827篇 |
特种医学 | 7992篇 |
外科学 | 48857篇 |
综合类 | 575篇 |
现状与发展 | 73篇 |
一般理论 | 56篇 |
预防医学 | 10594篇 |
眼科学 | 4087篇 |
药学 | 3678篇 |
中国医学 | 40篇 |
肿瘤学 | 14416篇 |
出版年
2024年 | 723篇 |
2023年 | 5137篇 |
2022年 | 1981篇 |
2021年 | 5018篇 |
2020年 | 6905篇 |
2019年 | 3760篇 |
2018年 | 9250篇 |
2017年 | 8589篇 |
2016年 | 9609篇 |
2015年 | 9816篇 |
2014年 | 17470篇 |
2013年 | 18014篇 |
2012年 | 9571篇 |
2011年 | 9477篇 |
2010年 | 12339篇 |
2009年 | 15864篇 |
2008年 | 8557篇 |
2007年 | 6904篇 |
2006年 | 8885篇 |
2005年 | 5906篇 |
2004年 | 4907篇 |
2003年 | 3574篇 |
2002年 | 3448篇 |
2001年 | 3912篇 |
2000年 | 3100篇 |
1999年 | 3340篇 |
1998年 | 3860篇 |
1997年 | 3634篇 |
1996年 | 3468篇 |
1995年 | 3309篇 |
1994年 | 2022篇 |
1993年 | 1625篇 |
1992年 | 1420篇 |
1991年 | 1440篇 |
1990年 | 1086篇 |
1989年 | 1208篇 |
1988年 | 1043篇 |
1987年 | 886篇 |
1986年 | 911篇 |
1985年 | 745篇 |
1984年 | 580篇 |
1983年 | 551篇 |
1982年 | 550篇 |
1981年 | 425篇 |
1980年 | 389篇 |
1979年 | 321篇 |
1978年 | 343篇 |
1977年 | 407篇 |
1975年 | 290篇 |
1972年 | 316篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Alexander E. J. Trevatt David R. Thomson Robert Miller Matthew Colquhoun Akinyemi I. Idowu Shakeel Rahman 《Journal of plastic surgery and hand surgery》2019,53(2):97-104
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
22.
23.
Whitney S. Brandt Wanpu Yan Jian Zhou Kay See Tan Joseph Montecalvo Bernard J. Park Prasad S. Adusumilli James Huang Matthew J. Bott Valerie W. Rusch Daniela Molena William D. Travis Mark G. Kris Jamie E. Chaft David R. Jones 《The Journal of thoracic and cardiovascular surgery》2019,157(2):743-753.e3
Objective
Comparative survival between neoadjuvant chemotherapy and adjuvant chemotherapy for patients with cT2-4N0-1M0 non–small cell lung cancer has not been extensively studied.Methods
Patients with cT2-4N0-1M0 non–small cell lung cancer who received platinum-based chemotherapy were retrospectively identified. Exclusion criteria included stage IV disease, induction radiotherapy, and targeted therapy. The primary end point was disease-free survival. Secondary end points were overall survival, chemotherapy tolerance, and ability of Response Evaluation Criteria In Solid Tumors response to predict survival. Survival was estimated using the Kaplan–Meier method, compared using the log-rank test and Cox proportional hazards models, and stratified using matched pairs after propensity score matching.Results
In total, 330 patients met the inclusion criteria (n = 92/group after propensity-score matching; median follow-up, 42 months). Five-year disease-free survival was 49% (95% confidence interval, 39-61) for neoadjuvant chemotherapy versus 48% (95% confidence interval, 38-61) for adjuvant chemotherapy (P = .70). On multivariable analysis, disease-free survival was not associated with neoadjuvant chemotherapy or adjuvant chemotherapy (hazard ratio, 1.1; 95% confidence interval, 0.64-1.90; P = .737), nor was overall survival (hazard ratio, 1.21; 95% confidence interval, 0.63-2.30; P = .572). The neoadjuvant chemotherapy group was more likely to receive full doses and cycles of chemotherapy (P = .014/0.005) and had fewer grade 3 or greater toxicities (P = .001). Response Evaluation Criteria In Solid Tumors response to neoadjuvant chemotherapy was associated with disease-free survival (P = .035); 15% of patients receiving neoadjuvant chemotherapy (14/92) had a major pathologic response.Conclusions
Timing of chemotherapy, before or after surgery, is not associated with an improvement in overall or disease-free survival among patients with cT2-4N0-1M0 non–small cell lung cancer who undergo complete surgical resection. 相似文献24.
25.
26.
Improvement in Tricuspid Annular Plane Systolic Excursion with Pulmonary Hypertension Therapy in Pediatric Patients 下载免费PDF全文
27.
28.
Interprofessional collaboration and communication in nursing homes: a qualitative exploration of problems in medical care for nursing home residents – study protocol 下载免费PDF全文
29.
The human visual system is amenable to a number of adaptive processes; one such process, or collection of processes, is the adaptation to blur. Blur adaptation can be observed as an improvement in vision under degraded conditions, and these changes occur relatively rapidly following exposure to blur. The potential important future directions of this research area and the clinical implications of blur adaptation are discussed. 相似文献