全文获取类型
收费全文 | 1056篇 |
免费 | 159篇 |
国内免费 | 10篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 113篇 |
妇产科学 | 13篇 |
基础医学 | 89篇 |
口腔科学 | 40篇 |
临床医学 | 164篇 |
内科学 | 236篇 |
皮肤病学 | 9篇 |
神经病学 | 42篇 |
特种医学 | 164篇 |
外科学 | 151篇 |
综合类 | 46篇 |
预防医学 | 42篇 |
眼科学 | 24篇 |
药学 | 21篇 |
中国医学 | 5篇 |
肿瘤学 | 50篇 |
出版年
2022年 | 4篇 |
2021年 | 11篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 38篇 |
2017年 | 42篇 |
2016年 | 41篇 |
2015年 | 35篇 |
2014年 | 42篇 |
2013年 | 65篇 |
2012年 | 33篇 |
2011年 | 30篇 |
2010年 | 60篇 |
2009年 | 58篇 |
2008年 | 34篇 |
2007年 | 28篇 |
2006年 | 21篇 |
2005年 | 20篇 |
2004年 | 16篇 |
2003年 | 16篇 |
2002年 | 11篇 |
2001年 | 21篇 |
2000年 | 9篇 |
1999年 | 7篇 |
1998年 | 59篇 |
1997年 | 55篇 |
1996年 | 56篇 |
1995年 | 52篇 |
1994年 | 28篇 |
1993年 | 42篇 |
1992年 | 20篇 |
1991年 | 19篇 |
1990年 | 20篇 |
1989年 | 18篇 |
1988年 | 28篇 |
1987年 | 22篇 |
1986年 | 18篇 |
1985年 | 13篇 |
1984年 | 13篇 |
1983年 | 18篇 |
1981年 | 17篇 |
1980年 | 9篇 |
1978年 | 5篇 |
1977年 | 11篇 |
1976年 | 13篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1973年 | 5篇 |
1970年 | 7篇 |
1969年 | 4篇 |
排序方式: 共有1225条查询结果,搜索用时 0 毫秒
991.
Impact of timing of recurrence following catheter ablation of scar‐related ventricular tachycardia on subsequent mortality 下载免费PDF全文
992.
Cardiac CT assessment of tissue thickness at the ostium of the left atrial appendage predicts acute success of radiofrequency ablation 下载免费PDF全文
993.
994.
Phase 2 multi‐institutional trial evaluating gemcitabine and stereotactic body radiotherapy for patients with locally advanced unresectable pancreatic adenocarcinoma 下载免费PDF全文
Joseph M. Herman MD MSc Daniel T. Chang MD Karyn A. Goodman MD Avani S. Dholakia MD Siva P. Raman MD Amy Hacker‐Prietz PA‐C Christine A. Iacobuzio‐Donahue MD Mary E. Griffith RN Timothy M. Pawlik MD Jonathan S. Pai BA Eileen O'Reilly MD George A. Fisher MD Aaron T. Wild MD Lauren M. Rosati BS Lei Zheng MD Christopher L. Wolfgang MD Daniel A. Laheru MD Laurie A. Columbo RN Elizabeth A. Sugar PhD Albert C. Koong MD PhD 《Cancer》2015,121(7):1128-1137
995.
Incorporation of diagnostic laparoscopy in the management algorithm for patients with peritoneal metastases: A multi‐institutional analysis 下载免费PDF全文
996.
997.
Contemporary management of benign parotid tumours – the increasing evidence for extracapsular dissection 下载免费PDF全文
Benign parotid tumours have historically often been managed surgically by superficial parotidectomy. While this approach usually gives a generous cuff of surrounding normal parotid tissue to increase tumour margins, it requires a much larger incision than the increasingly used extracapsular dissection (ECD) technique. Furthermore, superficial parotidectomy can result in marked facial hollowing, Frey syndrome and an increased risk of both temporary and permanent facial nerve weakness. ECD has been popularised as a safe alternative to parotidectomy primarily for the removal of mobile, benign parotid tumours with safe outcomes and reduced risk to the facial nerve. In this article, we review the growing body of evidence for ECD and include our own experience confirming the move away from superficial parotidectomy in contemporary practice for the treatment of benign parotid tumours. 相似文献
998.
999.
1000.
Elisabeth APM Romme John T Murchison Lisa D Edwards Edwin JR van Beek David M Murchison Erica PA Rutten Frank WJM Smeenk Michelle C Williams Emiel FM Wouters William MacNee 《Journal of bone and mineral research》2013,28(6):1369-1377
Osteoporosis is highly prevalent in chronic obstructive pulmonary disease (COPD) patients and has been related to several clinical features. However, most studies have been in relatively small COPD cohorts. Therefore, the objectives of this study were to compare bone attenuation measured on low‐dose chest computed tomography (CT) between COPD subjects and smoker and nonsmoker controls, and to relate bone attenuation to clinical parameters, inflammatory biomarkers, and outcomes in a large, well‐characterized COPD cohort. We studied 1634 COPD subjects, 259 smoker controls, and 186 nonsmoker controls who participated in a large longitudinal study (ECLIPSE). We measured bone attenuation, extent of emphysema, and coronary artery calcification (Agatston score) on baseline CT scans, and clinical parameters, inflammatory biomarkers, and outcomes. Bone attenuation was lower in COPD subjects compared with smoker and nonsmoker controls (164.9 ± 49.5 Hounsfield units [HU] versus 183.8 ± 46.1 HU versus 212.1 ± 54.4 HU, p < 0.001). Bone attenuation was not significantly different between COPD subjects and smoker controls after adjustment for age, sex, and pack‐years of smoking. In the COPD subjects, bone attenuation correlated positively with forced expiratory volume in 1 second (FEV1, r = 0.062, p = 0.014), FEV1/forced vital capacity (FVC) ratio (r = 0.102, p < 0.001), body mass index (r = 0.243, p < 0.001), fat‐free mass index (FFMI, r = 0.265, p < 0.001), and C‐reactive protein (r = 0.104, p < 0.001), and correlated negatively with extent of emphysema (r = ?0.090, p < 0.001), Agatston score (r = ?0.177, p < 0.001), and interleukin‐8 (r = ?0.054, p = 0.035). In a multiple regression model, older age, lower FFMI and higher Agatston score were associated with lower bone attenuation. Lower bone attenuation was associated with higher exacerbation (r = ?0.057, p = 0.022) and hospitalization (r = ?0.078, p = 0.002) rates but was not associated with all‐cause mortality. In conclusion, CT‐measured bone attenuation was lower in COPD subjects compared with nonsmoker controls but not compared with smoker controls, after adjustment for age, sex, and pack‐years of smoking. In the COPD subjects, bone attenuation was associated with age, body composition, and coronary artery calcification but was not associated with all‐cause mortality. 相似文献