全文获取类型
收费全文 | 1247篇 |
免费 | 53篇 |
国内免费 | 6篇 |
学科分类
医药卫生 | 1306篇 |
出版年
2021年 | 8篇 |
2020年 | 7篇 |
2018年 | 7篇 |
2017年 | 8篇 |
2016年 | 15篇 |
2015年 | 17篇 |
2014年 | 16篇 |
2013年 | 26篇 |
2012年 | 44篇 |
2011年 | 58篇 |
2010年 | 35篇 |
2009年 | 39篇 |
2008年 | 46篇 |
2007年 | 43篇 |
2006年 | 57篇 |
2005年 | 47篇 |
2004年 | 37篇 |
2003年 | 44篇 |
2002年 | 51篇 |
2001年 | 35篇 |
2000年 | 39篇 |
1999年 | 36篇 |
1998年 | 30篇 |
1997年 | 22篇 |
1996年 | 25篇 |
1995年 | 27篇 |
1994年 | 15篇 |
1993年 | 17篇 |
1992年 | 29篇 |
1991年 | 26篇 |
1990年 | 27篇 |
1989年 | 31篇 |
1988年 | 28篇 |
1987年 | 24篇 |
1986年 | 26篇 |
1985年 | 24篇 |
1984年 | 14篇 |
1983年 | 15篇 |
1982年 | 15篇 |
1981年 | 10篇 |
1980年 | 13篇 |
1979年 | 13篇 |
1978年 | 15篇 |
1977年 | 9篇 |
1976年 | 10篇 |
1972年 | 9篇 |
1971年 | 9篇 |
1970年 | 7篇 |
1943年 | 7篇 |
1936年 | 7篇 |
排序方式: 共有1306条查询结果,搜索用时 240 毫秒
1.
Michael Staehler Peter J. Goebell Lothar Müller Till-Oliver Emde Natalie Wetzel Lisa Kruggel Martina Jänicke Norbert Marschner the RCC-Registry Group 《International journal of cancer. Journal international du cancer》2020,146(5):1307-1315
Non-clear cell renal cell carcinoma is a very rare malignancy that includes several histological subtypes. Each subtype may need to be addressed separately regarding prognosis and treatment; however, no Phase III clinical trial data exist. Thus, treatment recommendations for patients with non-clear cell metastatic RCC (mRCC) remain unclear. We present first prospective data on choice of first- and second-line treatment in routine practice and outcome of patients with papillary mRCC. From the prospective German clinical cohort study (RCC-Registry), 99 patients with papillary mRCC treated with systemic first-line therapy between December 2007 and May 2017 were included. Prospectively enrolled patients who had started first-line treatment until May 15, 2016, were included into the outcome analyses (n = 82). Treatment was similar to therapies used for clear cell mRCC and consisted of tyrosine kinase inhibitors, mechanistic target of rapamycin inhibitors and recently checkpoint inhibitors. Median progression-free survival from start of first-line treatment was 5.4 months (95% confidence interval [CI], 4.1–9.2) and median overall survival was 12.0 months (95% CI, 8.1–20.0). At data cutoff, 73% of the patients died, 6% were still observed, 12% were lost to follow-up, and 9% were alive at the end of the individual 3-year observation period. Despite the lack of prospective Phase III evidence in patients with papillary mRCC, our real-world data reveal effectiveness of systemic clear cell mRCC therapy in papillary mRCC. The prognosis seems to be inferior for papillary compared to clear cell mRCC. Further studies are needed to identify drivers of effectiveness of systemic therapy for papillary mRCC. 相似文献
2.
The Brief Symptom Inventory (BSI), a 53-item psychiatric symptom checklist, was administered to 57 alcoholic inpatients on days 2, 10, 18 and 26 of their 28-day stay in an alcoholism rehabilitation unit at a Veterans Administration hospital. The results of the test show a steady decline in the patients' psychiatric symptomatology from week 1 to week 4 with the most dramatic improvement evidenced between weeks 1 and 2. 相似文献
3.
In most obstetric centers routine serum screening for hepatitis B is not part of standard prenatal care. This study was designed to determine whether hepatitis B screening is cost effective for routine prenatal testing. In a prenatal population of 585 adolescents the cost-benefit ratio of hepatitis B screening was compared with that of routine syphilis screening. Eight positive results were detected, with a cost of $1755 per positive case. This compared favorably with the frequency and cost of detection of syphilis in the same population. Routine hepatitis B screening is recommended for consideration in similar prenatal populations. 相似文献
4.
In a single patient suffering from a major depressive episode with melancholia (DSM-III), both severe psychomotor symptoms, such as stupor and mutism, and mood disturbances could be abolished completely and promptly by administration of the benzodiazepine lorazepam. Remission of symptoms was entirely and immediately reversed by the benzodiazepine antagonist Ro 15-1788. These drug effects were constantly reproducible. Possible mechanisms of action and the influence of GABAergic neurotransmission on affective and psychomotor state are discussed. 相似文献
5.
6.
The etiological diagnosis of obstruction is difficult during pregnancy. The authors report 3 cases of this rare association: obstruction due to adhesions [1], volvulus of the transverse colon on a common mesentery [1] and obstruction due to an appendix abscess [1]. Complementary investigations, obviously limited under these circumstances, were based on plain abdominal X-rays, repeated if necessary. The diagnosis must be made early and appropriate treatment given in order to ensure a good materno-fetal prognosis as was obtained in these 3 cases. 相似文献
7.
Leonidas JC; Berdon WE; Valderrama E; Neveling U; Schuval S; Weiss SJ; Hilfer C; Godine L 《Radiology》1996,198(2):377
8.
9.
Ohne Zusammenfassung 相似文献
10.
Deborah A Cahn-Weiner Sarah Tomaszewski Farias Laura Julian Danielle J Harvey Joel H Kramer Bruce R Reed Dan Mungas Margaret Wetzel Helena Chui 《Journal of the International Neuropsychological Society》2007,13(5):747-757
Impaired ability to conduct daily activities is a diagnostic criterion for dementia and a determinant of healthcare services utilization and caregiver burden. What predicts decline in instrumental activities of daily living (IADLs) is not well understood. This study examined measures of episodic memory, executive function, and MRI brain volumes in relation to baseline IADLs and as predictors of rate of IADL change. Participants were 124 elderly persons with cognitive function between normal and moderate dementia both with and without significant small vessel cerebrovascular disease. Random effects modeling showed that baseline memory and executive function (EXEC) were associated with baseline IADL scores, but only EXEC was independently associated with rate of change in IADLs. Whereas hippocampal and cortical gray matter volumes were significantly associated with baseline IADL scores, only hippocampal volume was associated with IADL change. In a model including cognitive and neuroimaging predictors, only EXEC independently predicted rate of decline in IADL scores. These findings indicate that greater executive dysfunction at initial assessment is associated with more rapid decline in IADLs. Perhaps executive function is particularly important with respect to maintaining IADLs. Alternatively, executive dysfunction may be a sentinel event indicating widespread cortical involvement and poor prognosis. 相似文献