全文获取类型
收费全文 | 1787篇 |
免费 | 120篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 65篇 |
儿科学 | 43篇 |
妇产科学 | 69篇 |
基础医学 | 184篇 |
口腔科学 | 60篇 |
临床医学 | 170篇 |
内科学 | 308篇 |
皮肤病学 | 32篇 |
神经病学 | 109篇 |
特种医学 | 63篇 |
外科学 | 239篇 |
综合类 | 46篇 |
预防医学 | 139篇 |
眼科学 | 66篇 |
药学 | 191篇 |
中国医学 | 40篇 |
肿瘤学 | 97篇 |
出版年
2024年 | 4篇 |
2023年 | 28篇 |
2022年 | 80篇 |
2021年 | 98篇 |
2020年 | 73篇 |
2019年 | 87篇 |
2018年 | 97篇 |
2017年 | 79篇 |
2016年 | 65篇 |
2015年 | 69篇 |
2014年 | 88篇 |
2013年 | 96篇 |
2012年 | 147篇 |
2011年 | 128篇 |
2010年 | 71篇 |
2009年 | 60篇 |
2008年 | 112篇 |
2007年 | 77篇 |
2006年 | 81篇 |
2005年 | 58篇 |
2004年 | 44篇 |
2003年 | 47篇 |
2002年 | 44篇 |
2001年 | 20篇 |
2000年 | 16篇 |
1999年 | 17篇 |
1998年 | 12篇 |
1997年 | 9篇 |
1996年 | 4篇 |
1995年 | 3篇 |
1994年 | 3篇 |
1992年 | 7篇 |
1991年 | 5篇 |
1990年 | 13篇 |
1989年 | 10篇 |
1988年 | 10篇 |
1987年 | 10篇 |
1986年 | 5篇 |
1985年 | 8篇 |
1984年 | 8篇 |
1983年 | 3篇 |
1982年 | 3篇 |
1981年 | 5篇 |
1978年 | 3篇 |
1977年 | 4篇 |
1976年 | 2篇 |
1975年 | 3篇 |
1973年 | 1篇 |
1969年 | 2篇 |
1928年 | 1篇 |
排序方式: 共有1921条查询结果,搜索用时 31 毫秒
991.
Leda Paganini Loubna A. Hadi Massimiliano Chetta Davide Rovina Laura Fontana Patrizia Colapietro Eleonora Bonaparte Lidia Pezzani Paola Marchisio Silvia M. Tabano Jole Costanza Silvia M. Sirchia Laura Riboni Donatella Milani Monica Miozzo 《Clinical genetics》2019,95(3):368-374
X-linked intellectual disability (XLID) refers to a clinically and genetically heterogeneous neurodevelopmental disorder, in which males are more heavily affected than females. Among the syndromic forms of XLID, identified by additional clinical signs as part of the disease spectrum, the association between XLID and severe myopia has been poorly characterized. We used whole exome sequencing (WES) to study two Italian male twins presenting impaired intellectual function and adaptive behavior, in association with severe myopia and mild facial dysmorphisms. WES analysis detected the novel, maternally inherited, mutation c.916G > C (G306R) in the X-linked heparan sulfate 6-O-sulfotransferase 2 (HS6ST2) gene. HS6ST2 transfers sulfate from adenosine 3′-phosphate, 5′-phosphosulfate to the sixth position of the N-sulphoglucosamine residue in heparan sulfate (HS) proteoglycans. Low HS sulfation levels are associated with defective optic disc and stalk morphogenesis during mammalian visual system development. The c.916G>C variant affects the HS6ST2 substrate binding site, and its effect was considered “deleterious” by in-silico tools. An in-vitro enzymatic assay showed that the HS6ST2 mutant isoform had significantly reduced sulphotransferase activity. Taken together, the results suggest that mutant HS6ST2 is possibly involved in the development of myopia and cognitive impairment, characteristics of the probands reported here. 相似文献
992.
Goyal Nikhil Apolo Andrea B. Berman Eliana D. Bagheri Mohammad Hadi Levine Jason E. Glod John W. Kaplan Rosandra N. Machado Laura B. Folio Les R. 《Journal of digital imaging》2017,30(3):275-286
Journal of Digital Imaging - Oncologists evaluate therapeutic response in cancer trials based on tumor quantification following selected “target” lesions over time. At our cancer... 相似文献
993.
Hassan Hashemi Payam Nabovati Abbasali Yekta Hadi Ostadimoghaddam Bardia Behnia Mehdi Khabazkhoob 《Strabismus》2017,25(2):60-66
Purpose: To determine the prevalence of different types of strabismus and heterophoria and their associated factors in underserved rural areas of Iran. Methods: Two rural areas in the north and southwest of Iran were randomly sampled using multistage cluster sampling. Individuals aged over 1 year, totaling 3851, were invited to participate in the study. In addition to collecting demographic data, optometric examinations were performed for each participant. Unilateral and alternating cover tests were performed at far (6 m) and near (40 cm) to detect tropia and phoria, respectively, and the magnitude of the deviation was measured using alternating cover test and prism bar. Tropia was defined as the presence of constant unilateral or alternating horizontal strabismus (exotropia or esotropia) at either far or near fixation distances. Far and near exophoria were defined as more than 3 prism diopters (PD) and 9 PD of exophoria at far and near fixation distances, respectively. Far esophoria was defined as more than 1 PD of esophoria at far. Near esophoria was defined as any amount of esophoria at near. Results: Of 3851 selected individuals, 3314 (86.5%) participated in the study. After excluding those who met the exclusion criteria or had missing data, eventually there were 3248 subjects available for this analysis. The prevalence of tropia and phoria was 4.3% (95% CI: 3.28-5.33) and 28.37% (95% CI: 19.12 -37.61), respectively. The prevalence of exotropia and esotropia was 3.87% (95% CI: 2.77-4.98) and 0.43% (95% CI: 0.19-0.67), respectively. The prevalence of near exophoria, far exophoria, near esophoria, and far esophoria was 25.96 (95% CI: 16.71-35.2), 4.82% (95% CI: 0.23-9.41), 0.47% (95% CI: 0.2-0.75), and 0.34% (95% CI: 0.06-0.63), respectively. In this study, the prevalence of tropia had no significant association with age, sex, living place, and refractive errors (all P values >0.05), while the prevalence of phoria increased significantly with increasing age (P<0.001) and was also significantly associated with living place (P<0.001). Conclusion: The prevalence of tropia and phoria was high in our study. Moreover, the prevalence of exotropia and exophoria was higher than esotropia and esophoria. The prevalence of phoria was significantly higher in older age groups and in the participants living in the southern villages. 相似文献
994.
995.
996.
997.
998.
999.
1000.