全文获取类型
收费全文 | 1711篇 |
免费 | 141篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 71篇 |
妇产科学 | 48篇 |
基础医学 | 230篇 |
口腔科学 | 55篇 |
临床医学 | 208篇 |
内科学 | 269篇 |
皮肤病学 | 66篇 |
神经病学 | 205篇 |
特种医学 | 11篇 |
外科学 | 185篇 |
综合类 | 20篇 |
一般理论 | 1篇 |
预防医学 | 172篇 |
眼科学 | 21篇 |
药学 | 132篇 |
中国医学 | 2篇 |
肿瘤学 | 136篇 |
出版年
2024年 | 5篇 |
2023年 | 22篇 |
2022年 | 19篇 |
2021年 | 54篇 |
2020年 | 50篇 |
2019年 | 47篇 |
2018年 | 71篇 |
2017年 | 42篇 |
2016年 | 54篇 |
2015年 | 54篇 |
2014年 | 64篇 |
2013年 | 85篇 |
2012年 | 117篇 |
2011年 | 126篇 |
2010年 | 61篇 |
2009年 | 62篇 |
2008年 | 116篇 |
2007年 | 114篇 |
2006年 | 73篇 |
2005年 | 91篇 |
2004年 | 75篇 |
2003年 | 83篇 |
2002年 | 65篇 |
2001年 | 30篇 |
2000年 | 20篇 |
1999年 | 28篇 |
1998年 | 18篇 |
1997年 | 9篇 |
1996年 | 10篇 |
1995年 | 4篇 |
1994年 | 6篇 |
1993年 | 4篇 |
1992年 | 17篇 |
1991年 | 17篇 |
1990年 | 15篇 |
1989年 | 7篇 |
1988年 | 10篇 |
1987年 | 9篇 |
1986年 | 10篇 |
1985年 | 14篇 |
1984年 | 11篇 |
1983年 | 9篇 |
1982年 | 5篇 |
1979年 | 7篇 |
1978年 | 5篇 |
1977年 | 4篇 |
1976年 | 6篇 |
1974年 | 6篇 |
1971年 | 4篇 |
1967年 | 3篇 |
排序方式: 共有1858条查询结果,搜索用时 15 毫秒
101.
102.
Ann H. Partridge MD MPH Virginia W. Norris MCG Victoria S. Blinder MD Bruce A. Cutter MD MMM Michael T. Halpern MD Jennifer Malin MD Michael N. Neuss MD Antonio C. Wolff MD 《Cancer》2013,119(1):158-163
BACKGROUND:
There is a need to better measure and improve the quality of oncology care and improve communication with patients and other providers. The American Society of Clinical Oncology Breast Cancer Registry (BCR) pilot evaluated the feasibility and acceptability of prospective data collection for quality assessment in daily clinical practice. Data were used to create and share treatment plans/summaries (TPSs) at the point of care.METHODS:
Using a web‐based tool, 20 diverse practices entered clinical data on each new early‐stage breast cancer patient into the BCR for 14 months (September 2009 through November 2010). The tool created individual TPSs that were shared with patients. Practices received practice‐specific and aggregate BCR quality measures data, participated in a survey, and received a participation stipend.RESULTS:
Twenty practices entered 2014 patients into the BCR, collecting demographic, clinical, and treatment information. Fifty‐two percent of practice participants replied to an end‐of‐pilot survey: 73% were satisfied with the BCR and web‐based tool, 31% expressed concern regarding time and effort, and 52% reported additional practice costs during the pilot. Among those who created or shared the TPSs, 90% thought the documents improved oncologist‐patient communication, and 95% favored using BCR data for practice quality improvement.CONCLUSIONS:
Prospective data collection for quality assessment is feasible and allows sharing of TPSs with patients at the point of care. Future efforts should focus on decreasing implementation burden to practices, broadening participation, examining costs, and, most importantly, assessing its effects on patient outcomes. Cancer 2013. © 2012 American Cancer Society. 相似文献103.
Skillgate E Vingård E Josephson M Theorell T Alfredsson L 《Journal of epidemiology and community health》2007,61(4):356-361
OBJECTIVE: To expand the knowledge about the occurrence of life events, and how they affect the risk of low back and neck/shoulder pain. DESIGN: A population-based case-control study. SETTING: Men and women 20-59-years old, living in and not working outside the municipality of Norrt?lje, Sweden, from November 1993 to November 1997. PARTICIPANTS: Cases (n = 1,148) were defined as all subjects from the study base who sought healthcare for a new episode of low back and/or neck/shoulder pain by any of the care givers in the municipality. Controls (n = 1,700) were selected as a stratified random sample from the study base, considering sex and age. Study subjects were interviewed about life events and critical life changes. Critical life changes were defined as events that brought about a marked psychosocial change. Odds ratios (ORs) associated with different numbers of life events or critical life changes were calculated. RESULTS: Having experienced at least two life events during the preceding 5 years was associated with an increased risk of neck/shoulder pain (OR = 1.6, 95% CI 1.1 to 2.4). At least two critical life changes were associated with an increased risk of neck/shoulder pain (OR = 1.9, 95% CI 1.3 to 2.7). In general, no associations were observed in relation to risk of low back pain. CONCLUSION: Life events and critical life changes are of importance for the risk of neck/shoulder pain of the kind that people are seeking care for. The study provides useful information for clinical practice and for future aetiological research on neck/shoulder pain. 相似文献
104.
105.
Interaction of two members of the heterogeneous nuclear ribonucleoprotein (hnRNP) family with the 3'untranslated region (UTR) of the murine inducible nitric-oxide synthase (iNOS) mRNA is demonstrated in this study. An iNOS RNA-protein complex is formed using protein extracts from untreated and septic shock treated mouse liver. UV cross-linking reveals that the complex consists of at least two proteins, with apparent molecular masses of 60 and 70 kDa, respectively. The 60-kDa protein binding site lies within a 112-nt pyrimidine-rich sequence, approximately 160 nt from the coding sequence, and the RNA-protein complex can be precipitated by a monoclonal antibody directed against hnRNP I [also named polypyrimidine tract binding protein (PTB)]. The 70-kDa protein binds a 43-nt sequence near the 3'end of the 3'UTR and is immunoprecipitated by a monoclonal antibody against hnRNP L. A computer-simulated conformation of the 3'UTR suggests that both binding sites reside in regions easily accessible for a protein. Supershifts of the native RNA-protein complex could only be achieved with anti-hnRNP L, suggesting that within this multiprotein RNA complex, only hnRNP L is exposed to the antibodies, whereas the hnRNP I/PTB is mainly responsible for its interaction with the mRNA. Up-regulation of iNOS by septic shock reduces the RNA-protein complex formation, thus showing that hnRNP I/PTB and hnRNP L binding to the iNOS mRNA is modulated by inflammation. This suggests a novel function for the two previously described proteins as regulators of the iNOS gene. 相似文献
106.
107.
de la Mora MP Cárdenas-Cachón L Vázquez-García M Crespo-Ramírez M Jacobsen K Höistad M Agnati L Fuxe K 《Neuroscience letters》2005,377(2):101-105
The intercalated islands are intra-amigdaloid clusters of D1 receptor rich GABAergic neurons, which control impulse traffic between the basolateral complex and the central nucleus of the amygdala. As dopaminergic transmission within the amygdala may play a role in anxiety, the effect of the D1 antagonist SCH23390 microinjected mainly close to the rostral intercalated islands in rats was studied, using the White and Black Box test. SCH23390 reduced anxiety by an increase in the latency of the first entry into the black compartment and by an increase in the total time spent in the white compartment of the White and Black Box test, while there was no significant modification of locomotion. It is suggested that blockade of D1 receptors in the rostral intercalated islands may reduce anxiety through a reduction of GABA-mediated dishinibition of the central amygdaloid nucleus. 相似文献
108.
109.
Malin F. Böttcher Jenny Bjurström Xiao-Mei Mai Lennart Nilsson Maria C. Jenmalm 《Pediatric allergy and immunology》2003,14(5):345-350
Atopic asthma is characterized by excessive T helper 2 (Th2)-like immunity to allergens in the bronchial mucosa. The Th2-cytokine interleukin (IL)-4 induces IgE production, while the Th2-cytokine IL-5 promotes eosinophilic inflammation in the airways of asthmatics. Most asthmatics are atopic, but a subgroup is non-atopic. We hypothesize that allergen-induced Th2, particularly IL-5, responses can be observed in peripheral blood in both atopic and non-atopic asthmatic children but not in healthy control children. The aim of the present study was to determine IL-4, IL-5, IL-9, IL-10, IL-13 and IFN-γ secretion induced from peripheral blood mononuclear cells (PBMC) by a broad panel of inhalant allergens (timothy, cat, birch, dog and house dust mite) in asthmatic children with and without sensitization. The study included 13 atopic asthmatic, 5 non-atopic asthmatic, and 12 non-atopic non-asthmatic children. PBMC were stimulated with allergens and cytokine production was measured with enzyme-linked immunosorbent assay (ELISA). Higher levels of cat and dog antigen-induced IL-5 release were more commonly observed in both atopic and non-atopic asthmatics than in controls. Children with atopic, but not non-atopic, asthma produced higher levels of allergen-induced IL-4 and IL-9 than controls. Non-atopic asthmatics produced more IL-10 than atopic asthmatics after cat stimulation. High levels of eosinophilia-associated IL-5 responses are induced by cat and dog allergen in both atopic and non-atopic asthmatic children. The Th2 cytokines IL-4 and IL-9 were associated only with atopic asthma, probably due to their IgE-inducing properties. 相似文献
110.
Treating mood disorders during pregnancy: safety considerations. 总被引:2,自引:0,他引:2
Mood disorders in pregnancy may have a negative effect on self care and pregnancy outcome that affects the mother directly and the child indirectly. Thus, some women may require pharmacological treatment. Pharmacotherapy of mood disorders during pregnancy implies specific considerations.This paper presents an updated review of available studies on the treatment of mood disorders and present knowledge on teratogenicity, neonatal effects and long-term neurobehavioural effects for the different psychotropic drugs, including treatment with selective serotonin reuptake inhibitors (SSRIs), tricyclic antidepressants (TCAs), other antidepressants, benzodiazepines, lithium, carbamazepine/valproic acid, lamotrigine and novel antipsychotics. However, the existing knowledge on the use of antidepressants and mood stabilising agents during pregnancy is hampered by a lack of results from randomised controlled trials.SSRIs and TCAs have not been associated with an increased risk of major malformations, but poor neonatal adaptation has been described. Benzodiazepines used in the first trimester have been associated with orofacial clefts. Mood stabilisers such as lithium, carbamazepine and valproic acid (sodium valproate) are associated with an increased risk of fetal malformations. Both benzodiazepines and lithium may cause adaptation problems in the newborn. In utero exposure to novel antipsychotics has not been associated with congenital malformations; however, the data are still limited. The knowledge about long-term neurobehavioural effects in the offspring is still limited for all agents and requires further investigation. Possible adverse effects of fetal exposure must be balanced against the adverse effects of an untreated maternal mood disorder. 相似文献