收费全文 | 5467篇 |
免费 | 294篇 |
国内免费 | 21篇 |
耳鼻咽喉 | 58篇 |
儿科学 | 64篇 |
妇产科学 | 98篇 |
基础医学 | 703篇 |
口腔科学 | 122篇 |
临床医学 | 358篇 |
内科学 | 1366篇 |
皮肤病学 | 93篇 |
神经病学 | 430篇 |
特种医学 | 406篇 |
外科学 | 823篇 |
综合类 | 35篇 |
一般理论 | 1篇 |
预防医学 | 180篇 |
眼科学 | 73篇 |
药学 | 317篇 |
中国医学 | 10篇 |
肿瘤学 | 645篇 |
2023年 | 25篇 |
2022年 | 19篇 |
2021年 | 132篇 |
2020年 | 53篇 |
2019年 | 85篇 |
2018年 | 119篇 |
2017年 | 64篇 |
2016年 | 113篇 |
2015年 | 79篇 |
2014年 | 116篇 |
2013年 | 146篇 |
2012年 | 242篇 |
2011年 | 276篇 |
2010年 | 145篇 |
2009年 | 125篇 |
2008年 | 197篇 |
2007年 | 216篇 |
2006年 | 232篇 |
2005年 | 242篇 |
2004年 | 254篇 |
2003年 | 277篇 |
2002年 | 286篇 |
2001年 | 248篇 |
2000年 | 217篇 |
1999年 | 210篇 |
1998年 | 95篇 |
1997年 | 66篇 |
1996年 | 56篇 |
1995年 | 61篇 |
1994年 | 60篇 |
1993年 | 49篇 |
1992年 | 116篇 |
1991年 | 128篇 |
1990年 | 112篇 |
1989年 | 121篇 |
1988年 | 123篇 |
1987年 | 93篇 |
1986年 | 89篇 |
1985年 | 66篇 |
1984年 | 59篇 |
1983年 | 46篇 |
1982年 | 27篇 |
1981年 | 29篇 |
1980年 | 19篇 |
1979年 | 30篇 |
1978年 | 29篇 |
1977年 | 18篇 |
1975年 | 20篇 |
1969年 | 18篇 |
1968年 | 22篇 |
Background
The Tama-REgistry of Acute endovascular Thrombectomy (TREAT) is a multicenter registry of endovascular thrombectomy in the Tama area of Tokyo. The objective of this study was to confirm the real-world status of 2 paradigms of transportation.Methods
This was a retrospective analysis of data from TREAT. Patients were divided into 2 groups and 2 periods: directly admitted to an endovascular thrombectomy-capable center (ECC; group D)/secondary transfer from a non-ECC (group S), and the first period/the second period. Transfer distance, workflow metrics, and clinical outcomes were analyzed.Results
A total of 326 patients, including 264 in group D and 62 in group S, were analyzed. The median distance from the onset-to-ECC was 3.62km for group D and 7.87km for group S (P < .001). The median onset-to-needle (OTN) time was longer for group S (168 minutes) than group D (138 minutes; P?=?.006). The median onset-to-reperfusion (OTR) time was significantly shorter for group D (247 minutes) than for group S (304 minutes; P?=?.029). With respect to the 2 periods, there was no significant difference in onset-to-puncture time between the 2 groups in the first period (207 minutes versus 243.5 minutes, respectively, P?=?.50), while there was one in the second period (164 minutes versus 246.5 minutes, respectively, P?=?.02).Conclusions
This region-wide registry study showed longer OTN and OTR times, with no improvement of the time course over time in patients transported via non-ECCs. These results should be used to create a regional medical policy for the management of acute ischemic stroke. 相似文献In this study, total body clearance (CLt), volume of distribution at steady state (Vss) and plasma concentration–time profiles in humans of model compounds were predicted using chimeric mice with humanized livers.
On the basis of assumption that unbound intrinsic clearance (CLUint) per liver weight in chimeric mice was equal to those in humans, CLt were predicted by substituting human liver blood flow and liver weights in well-stirred model. Vss were predicted by Rodgers equation using scaling factors of tissue-plasma concentration ratios (SFKp) in chimeric mice estimated from a difference between the observed and predicted Vss. These physiological approaches showed high prediction accuracy for CLt and Vss values in humans.
We compared the predictability of CLt and Vss determined by the physiologically based predictive approach using chimeric mice with those from predictive methods reported by Pharmaceutical Research Manufacturers of America. The physiological approach using chimeric mice indicated the best prediction accuracy in each predictive method.
Simulation of human plasma concentration–time profiles were generally successful with physiologically based pharmacokinetic (PBPK) model incorporating CLUint and SFKp obtained from chimeric mice.
Combined application of chimeric mice and PBPK modeling is effective for prediction of human PK in various compounds.