全文获取类型
收费全文 | 565篇 |
免费 | 31篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 36篇 |
妇产科学 | 2篇 |
基础医学 | 52篇 |
口腔科学 | 18篇 |
临床医学 | 63篇 |
内科学 | 131篇 |
皮肤病学 | 8篇 |
神经病学 | 16篇 |
特种医学 | 79篇 |
外科学 | 64篇 |
综合类 | 62篇 |
预防医学 | 21篇 |
眼科学 | 8篇 |
药学 | 22篇 |
肿瘤学 | 20篇 |
出版年
2024年 | 1篇 |
2023年 | 2篇 |
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 5篇 |
2019年 | 3篇 |
2018年 | 8篇 |
2017年 | 6篇 |
2016年 | 12篇 |
2015年 | 16篇 |
2014年 | 13篇 |
2013年 | 19篇 |
2012年 | 9篇 |
2011年 | 12篇 |
2010年 | 21篇 |
2009年 | 33篇 |
2008年 | 13篇 |
2007年 | 26篇 |
2006年 | 33篇 |
2005年 | 11篇 |
2004年 | 12篇 |
2003年 | 4篇 |
2002年 | 9篇 |
2001年 | 11篇 |
2000年 | 7篇 |
1999年 | 14篇 |
1998年 | 42篇 |
1997年 | 31篇 |
1996年 | 40篇 |
1995年 | 18篇 |
1994年 | 18篇 |
1993年 | 23篇 |
1992年 | 7篇 |
1991年 | 8篇 |
1990年 | 3篇 |
1989年 | 11篇 |
1988年 | 24篇 |
1987年 | 9篇 |
1986年 | 9篇 |
1985年 | 18篇 |
1984年 | 7篇 |
1983年 | 4篇 |
1982年 | 3篇 |
1981年 | 3篇 |
1980年 | 3篇 |
1977年 | 4篇 |
1976年 | 5篇 |
1975年 | 3篇 |
排序方式: 共有603条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Background
The Shoulder Pain and Disability Index (SPADI) is a self-report measure developed to evaluate patients with shoulder pathology. While some validation has been conducted, broader analyses are indicated. This study determined aspects of cross-sectional and longitudinal validity of the SPADI. 相似文献5.
6.
7.
8.
9.
Effect of acute psychological stress on the inhibition of in vitroplatelet aggregation by dietary long-chain n-3 fatty acids was studied in 20 adult males. Subjects were randomly divided into groups receiving either olive oil or fish oil (2.4 g long-chain n-3 fatty acids/day) for 4 weeks. In vitroaggregation responses to two doses of ADP collagen, and epinephrine were measured immediately prior to and following exposure to three psychological stressors (2 min each), before and after the supplementation period. Olive oil had no effect on baseline aggregatory responses, while fish oil reduced aggregatory responses to ADP and epinephrine. Exposure to the stressors had no effect upon presupplementation aggregation in either group or in the olive oil group postsupplementation. However, stress abolished antiaggregatory effects of fish oil. This reversal of the antiaggregatory effects of fish oil by mild stress suggests possible limitations of low-dose fish oil supplementation in clinical situations.This study was funded by a grant-in-aid from the Heart and Stroke Foundation of Ontario. 相似文献
10.
Bals-Pratsch M; De Geyter C; Muller T; Frieling U; Lerchl A; Pirke KM; Hanker JP; Becker-Carus C; Nieschlag E 《Human reproduction (Oxford, England)》1997,12(5):896-904
Preliminary data have suggested that female infertility due to corpus
luteum insufficiency may be caused by subclinical hypothyroidism
[exaggerated thyroid-stimulating hormone (TSH) response to thyrotrophin-
releasing hormone (TRH) stimulation]. L-Thyroxine supplementation has been
recommended to achieve pregnancies in subclinical hypothyroid women. This
controlled study was carried out in order to investigate the biochemical
diagnosis of subclinical hypothyroidism as a possible infertility factor.
Five infertile patients (aged 25-36 years) with subclinical hypothyroidism
(n = 4, stimulated TSH >20 microU/ml) or primary hypothyroidism (n = 1)
and five healthy controls (aged 22-39 years) with normal thyroid function
(stimulated TSH <15 microU/ml), regular cycles and no history of
infertility were studied in the early follicular phase. In the pre-study
evaluation, eight of 23 volunteers (34.8%) had to be excluded because of
subclinical hypothyroidism with stimulated TSH values (TSHs) >15
microU/ml. Cycle function of patients and controls was compared by the
method of LH pulse pattern analysis. Therefore blood samples were drawn
every 10 min during a 24 h period. Sleep was recorded from midnight to 7
a.m. Repetition of the TRH tests at the end of the 24 h blood sampling
period confirmed the difference in stimulated TSH values of the two study
groups. Pulse analysis for luteinizing hormone (LH), TSH and prolactin
showed no differences between patients and controls for pulse frequency,
amplitude, height, length, area under curve (AUC) and the 24 h mean. Even
the hypothyroid patient had a normal LH pulse pattern. Additional
measurement of melatonin in pooled sera every 30 min gave the
well-documented diurnal profiles during day and night for both groups.
Patients had significantly higher melatonin values at seven time points
during the night. Peaks for LH, TSH, prolactin and cortisol were correlated
with the sleep stages wake, rapid eye movement, 1 + 2 and 3 + 4. We
concluded that corpus luteum insufficiency in female infertility cannot be
explained by subclinical hypothyroidism and thus should not be treated with
L-thyroxine for fertility reasons.
相似文献