全文获取类型
| 收费全文 | 30272篇 |
| 免费 | 1574篇 |
| 国内免费 | 245篇 |
专业分类
| 耳鼻咽喉 | 222篇 |
| 儿科学 | 478篇 |
| 妇产科学 | 295篇 |
| 基础医学 | 3555篇 |
| 口腔科学 | 610篇 |
| 临床医学 | 1820篇 |
| 内科学 | 8301篇 |
| 皮肤病学 | 1441篇 |
| 神经病学 | 2462篇 |
| 特种医学 | 1162篇 |
| 外科学 | 5100篇 |
| 综合类 | 155篇 |
| 一般理论 | 3篇 |
| 预防医学 | 695篇 |
| 眼科学 | 553篇 |
| 药学 | 2197篇 |
| 中国医学 | 69篇 |
| 肿瘤学 | 2973篇 |
出版年
| 2023年 | 187篇 |
| 2022年 | 309篇 |
| 2021年 | 725篇 |
| 2020年 | 414篇 |
| 2019年 | 558篇 |
| 2018年 | 643篇 |
| 2017年 | 507篇 |
| 2016年 | 653篇 |
| 2015年 | 677篇 |
| 2014年 | 905篇 |
| 2013年 | 1036篇 |
| 2012年 | 1716篇 |
| 2011年 | 1860篇 |
| 2010年 | 1084篇 |
| 2009年 | 848篇 |
| 2008年 | 1544篇 |
| 2007年 | 1729篇 |
| 2006年 | 1616篇 |
| 2005年 | 1599篇 |
| 2004年 | 1562篇 |
| 2003年 | 1476篇 |
| 2002年 | 1466篇 |
| 2001年 | 722篇 |
| 2000年 | 765篇 |
| 1999年 | 736篇 |
| 1998年 | 410篇 |
| 1997年 | 324篇 |
| 1996年 | 295篇 |
| 1995年 | 252篇 |
| 1994年 | 210篇 |
| 1993年 | 188篇 |
| 1992年 | 494篇 |
| 1991年 | 431篇 |
| 1990年 | 444篇 |
| 1989年 | 462篇 |
| 1988年 | 417篇 |
| 1987年 | 391篇 |
| 1986年 | 334篇 |
| 1985年 | 301篇 |
| 1984年 | 189篇 |
| 1983年 | 163篇 |
| 1982年 | 96篇 |
| 1981年 | 80篇 |
| 1979年 | 170篇 |
| 1978年 | 83篇 |
| 1977年 | 92篇 |
| 1974年 | 76篇 |
| 1973年 | 82篇 |
| 1972年 | 87篇 |
| 1970年 | 74篇 |
排序方式： 共有10000条查询结果，搜索用时 31 毫秒
1.
2.
Shingo Hashimoto Masaki Katsurada Rie Muramatsu Kumiko Asai Kenichiro Tanaka Kensuke Hayashi Yoshiaki Kibe Koichiro Nakajima Yukiko Hattori Hiromitsu Iwata Jun-etsu Mizoe Hiroyuki Ogino Yuta Shibamoto 《Practical radiation oncology》2019,9(2):e149-e155
Purpose
Suppression of respiratory movement of the liver would be desirable for high-precision radiation therapy for liver tumors. We aimed to investigate the effect of our original device-free compressed shell fixation method and breathing instruction on suppression of respiratory movement. The characteristics of liver motion based on the movement of a fiducial marker were also analyzed.Methods and Materials
First, respiratory amplitudes of the liver with the device-free compressed shell were analyzed from the data of 146 patients. The effect of this shell fixing method on liver movement was evaluated. Second, as another cohort study with 166 patients, interfractional internal motion of the liver for patients fixed in the shell was calculated using the fiducial marker coordinate data of images for position setting before daily irradiation. Third, in another 12 patients, intrafractional internal motion was calculated from the fiducial marker coordinate data using x-ray images before and after irradiation.Results
The median respiratory movement without the shell, after fixing with the shell, and after instructing on the breathing method with the shell was 14.2 (interquartile range, 10.7-19.8), 11.5 (8.6-17.5), and 10.4 mm (7.3-15.8), respectively. Systematic and random errors of interfractional internal motion were all ≤2 mm in the left-right and anteroposterior directions and 3.7 and 3.0 mm, respectively, in the craniocaudal direction. Systematic and random errors of intrafractional internal motion were all ≤1.3 mm in the left-right and anteroposterior directions and 0.8 and 2.4 mm, respectively, in the craniocaudal direction.Conclusions
The device-free compressed shell fixation method was effective in suppressing the respiratory movement of the liver. Irradiation position matching using the fiducial marker can correct the interfractional internal motion on each day, which would contribute to the reduction of the margin to be given around the target. 相似文献3.
A case of bullous pemphigoid associated with psoriasis vulgaris showing Hailey–Hailey disease‐like histopathological changes in regenerated epidermis without genomic mutation in ATP2C1 or ATP2A2 gene 
下载免费PDF全文
下载免费PDF全文 4.
5.
6.
Hiroto Kinoshita Hitomi Nishioka Aya Ikeda Kyoko Ikoma Yoichi Sameshima Hidehisa Ohi Mizuki Tatsuno Junka Kouyama Chiaki Kawamoto Tomohiro Mitsui Yuko Tamura Yu Hashimoto Masashi Nishio Tsuyoshi Ogashiwa Yusuke Saigusa Shin Maeda Hideaki Kimura Reiko Kunisaki Kazuhiko Koike 《Journal of gastroenterology and hepatology》2019,34(11):1929-1939
7.
Yosuke Homma Takashi Shiga Hiraku Funakoshi Dai Miyazaki Atsushi Sakurai Yoshio Tahara Ken Nagao Naohiro Yonemoto Arino Yaguchi Naoto Morimura 《The American journal of emergency medicine》2019,37(2):241-248
Objective
This study assessed the association between the timing of first epinephrine administration (EA) and the neurological outcomes following out-of-hospital cardiac arrests (OHCAs) with both initial shockable and non-shockable rhythms.Methods
This was a post-hoc analysis of a multicenter prospective cohort study (SOS-KANTO 2012), which registered OHCA patients in the Kanto region of Japan from January 2012 to March 2013. We included consecutive adult OHCA patients who received epinephrine. The primary result included 1-month favorable neurological outcomes defined as cerebral performance category (CPC) 1 or 2. Secondary results included 1-month survival and return of spontaneous circulation (ROSC) after arrival at the hospital. Multivariable logistic regression analysis determined the association between delay per minute of the time from call to first EA in both pre- or in-hospital settings and outcomes.Results
Of the 16,452 patients, 9344 were eligible for our analyses. In univariable analysis, the delay in EA was associated with decreased favorable neurological outcomes only when the initial rhythm was a non-shockable rhythm. In multivariable analyses, delay in EA was associated with decreased ROSC (adjusted odds ratio [OR] for one minute delay, 0.97; 95% confidence interval [CI], 0.96–0.98) and 1-month survival (adjusted OR, 0.95; 95% CI, 0.92–0.97) when the initial rhythm was a non-shockable rhythm, whereas during a shockable rhythm, delay in EA was not associated with decreased ROSC and 1-month survival.Conclusions
While assessing the effectiveness of epinephrine for OHCA, we should consider the time-limited effects of epinephrine. Additionally, consideration of early EA based on the pathophysiology is needed. 相似文献8.
neurogenetics - Mediator (MED) is a key regulator of protein-coding gene expression, and mutations in MED subunits are associated with a broad spectrum of diseases. Because mutations in MED17... 相似文献
9.