全文获取类型
收费全文 | 1053篇 |
免费 | 127篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 33篇 |
儿科学 | 36篇 |
妇产科学 | 4篇 |
基础医学 | 130篇 |
口腔科学 | 33篇 |
临床医学 | 63篇 |
内科学 | 250篇 |
皮肤病学 | 18篇 |
神经病学 | 83篇 |
特种医学 | 31篇 |
外科学 | 210篇 |
综合类 | 20篇 |
一般理论 | 1篇 |
预防医学 | 100篇 |
眼科学 | 4篇 |
药学 | 48篇 |
中国医学 | 1篇 |
肿瘤学 | 116篇 |
出版年
2019年 | 11篇 |
2018年 | 9篇 |
2016年 | 14篇 |
2015年 | 18篇 |
2014年 | 18篇 |
2013年 | 20篇 |
2012年 | 50篇 |
2011年 | 36篇 |
2010年 | 20篇 |
2009年 | 12篇 |
2008年 | 29篇 |
2007年 | 32篇 |
2006年 | 45篇 |
2005年 | 32篇 |
2004年 | 35篇 |
2003年 | 40篇 |
2002年 | 22篇 |
2001年 | 32篇 |
2000年 | 21篇 |
1999年 | 22篇 |
1997年 | 11篇 |
1995年 | 12篇 |
1994年 | 9篇 |
1993年 | 10篇 |
1992年 | 21篇 |
1991年 | 22篇 |
1990年 | 31篇 |
1989年 | 16篇 |
1988年 | 17篇 |
1987年 | 18篇 |
1986年 | 27篇 |
1985年 | 28篇 |
1984年 | 26篇 |
1983年 | 18篇 |
1982年 | 13篇 |
1981年 | 14篇 |
1980年 | 9篇 |
1979年 | 18篇 |
1978年 | 16篇 |
1977年 | 13篇 |
1976年 | 16篇 |
1975年 | 19篇 |
1974年 | 19篇 |
1973年 | 16篇 |
1971年 | 18篇 |
1970年 | 29篇 |
1969年 | 9篇 |
1968年 | 20篇 |
1967年 | 25篇 |
1966年 | 23篇 |
排序方式: 共有1181条查询结果,搜索用时 15 毫秒
1.
Stephen T Chasen Stacey J Spiro Robin B Kalish Frank A Chervenak 《The journal of maternal-fetal & neonatal medicine》2005,17(1):45-48
OBJECTIVE: The aim of the study was to describe the occurrence of spontaneous version in twins in the third trimester, as well as the correlation between antepartum and birth presentation. METHODS: Twin pregnancies were divided into four gestational age intervals: 20-23; 24-27; 28-31; and 32-36 weeks. Fetal presentation was categorized as cephalic (C) or non-cephalic (NC). Hospital records were reviewed to determine demographic factors, including mode of conception. Chi-square was used to compare distributions of presentations, and Cramer's V measure of association was used to correlate presentations in individual pregnancies between antepartum intervals and birth. RESULTS: A total of 207 pregnancies were included. The distribution of fetal presentations changed significantly through gestational age intervals (p < 0.001), although they were similar between 32-36 weeks and birth (p = 0.75). Correlation between antepartum and birth presentation in individual pregnancies strengthened throughout the four intervals. No correlation was seen between parity, gender, birthweight, or in vitro fertilization and fetal presentation or rate of spontaneous version.CONCLUSION: Many twins undergo spontaneous version in the third trimester, though there is excellent correlation between presentation at 32-36 weeks and birth. A cephalic presenting twin at > or = 28 weeks is highly likely to be in cephalic presentation at delivery. 相似文献
2.
3.
Neurological paraneoplastic syndromes in patients with small cell lung cancer. A prospective survey of 150 patients. 总被引:1,自引:1,他引:0 下载免费PDF全文
G M Elrington N M Murray S G Spiro J Newsom-Davis 《Journal of neurology, neurosurgery, and psychiatry》1991,54(9):764-767
One hundred and fifty patients presenting with small cell lung cancer (SCLC) to chest physicians, were assessed neurologically. Neuromuscular or autonomic deficits were common and occurred in up to 44% of cases. Weakness, dry mouth, and weight loss were not mutually independent and may represent the syndrome formerly described as carcinomatous neuromyopathy. By contrast, undoubted paraneoplastic syndromes were much less commonly detected. Two patients had the Lambert-Eaton myasthenic syndrome (LEMS) and one had subacute sensory neuropathy (SSN). In these patients, neurological symptoms antedated other manifestations of cancer, by between six and 17 months. The 95% confidence interval for the prevalence of LEMS or SSN among SCLC patients was 0-4%, consistent with the results of previous retrospective or smaller studies: summing these, the overall prevalence of LEMS among SCLC patients is close to 3%, which implies about 250 new cases per annum in England and Wales. If LEMS and SSN are the least uncommon neurological paraneoplastic syndromes in SCLC patients, this may reflect the accessibility of motor nerve terminals and dorsal root ganglia to cross-reactive anti-tumour cell antibodies. 相似文献
4.
Ohne Zusammenfassung 相似文献
5.
L. Asher und K. Spiro 《Monatsschrift für Kinderheilkunde》1902,1(2):V-VI
Ohne Zusammenfassung 相似文献
6.
Stage means more than grade in adenoid cystic carcinoma. 总被引:10,自引:0,他引:10
Our experience with 184 previously untreated patients who had adenoid cystic carcinoma of salivary gland origin is reviewed. Retrospective staging was possible in all but nine patients who had minor salivary gland primary tumors. Sixty-three percent of patients were diagnosed as having stage I or stage II disease (stage I, 64 patients; stage II, 47 patients), whereas 43 and 21 patients had stage III and IV tumors, respectively. Grading was as follows: cribriform pattern only (grade 1, 126 patients; 68%), mixed cribriform and solid features (grade 2, 48 patients; 26%), and solid only (grade 3, 10 patients; 5%). Treatment was predominantly surgical (174 patients), and relatively few patients received adjunctive, postoperative irradiation (27 patients). Cumulative 10-year survival was 75%, 43%, and 15% for stage I, stage II, and stage III and IV patients, respectively, and cause-specific survival at 10 years was as high as 94% in patients with stage I disease. Only the clinical stage had a significant impact on survival. Neither survival, regional metastases (16 patients; 11%), nor distant dissemination (64 patients; 43%) was predictable on the basis of tumor grade alone. The prognosis in patients with early stage lesions may be better than has been appreciated. 相似文献
7.
8.
9.
The indications for elective treatment of the neck in cancer of the major salivary glands. 总被引:8,自引:0,他引:8
J G Armstrong L B Harrison H T Thaler H Friedlander-Klar D E Fass M J Zelefsky J P Shah E W Strong R H Spiro 《Cancer》1992,69(3):615-619
To define the indications for elective neck treatment, the cases of 474 previously untreated patients were reviewed who had locally confined major salivary gland cancers treated between 1939 and 1982. Clinically positive nodes were present in 14% (67 of 474). Overall, clinically occult, pathologically positive nodes occurred in 12% (47 of 407). By univariate analysis, several factors appeared to predict the risk of occult metastases; however, multivariate analysis revealed that only size and grade were significant risk factors. Tumors 4 cm or more in size had a 20% (32 of 164) risk of occult metastases compared with a 4% (nine of 220) risk for smaller tumors (P less than 0.00001). High-grade tumors (regardless of histologic type) had a 49% (29 of 59) risk of occult metastases compared with a 7% (15 of 221) risk for intermediate-grade or low-grade tumors (P less than 0.00001). In view of the low frequency of occult metastases in the entire group, routine elective treatment of the neck is not recommended. High-grade tumors and larger tumors have a high rate of occult neck metastases, and treatment should be considered in this group. 相似文献
10.
Zahava Sololmon Shimon E. Spiro Arik Shalev Avi Bleich Samuel Cooper 《Journal of traumatic stress》1992,5(2):217-223
Nine months after the residential stage of Koach, participants were asked to evaluate the program's effectiveness. Most of the veterans reported improvement in the areas queried, and especially in social relations, and nearly all of them stated that they would recommend the program to other veterans. The commander-therapists became the major source of help for these veterans following the Koach project, and about half reported that they participated regularly in self-help groups. Most of the participants acquired coping techniques that continued to serve them 9 months after the end of the residential stage of Koach. One of the more important measures of Koach was thought to be the veterans' own evaluations of the project, their assessment of the project's success in achieving its aims, and their satisfaction with it. In this article we will present the subjects' evaluations of treatment effectiveness as expressed in behavioral and emotional changes that they attributed to the treatment. 相似文献