全文获取类型
收费全文 | 595篇 |
免费 | 41篇 |
国内免费 | 8篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 28篇 |
妇产科学 | 13篇 |
基础医学 | 59篇 |
口腔科学 | 48篇 |
临床医学 | 152篇 |
内科学 | 79篇 |
皮肤病学 | 8篇 |
神经病学 | 74篇 |
特种医学 | 21篇 |
外科学 | 51篇 |
预防医学 | 35篇 |
眼科学 | 18篇 |
药学 | 34篇 |
中国医学 | 1篇 |
肿瘤学 | 21篇 |
出版年
2023年 | 4篇 |
2022年 | 7篇 |
2021年 | 11篇 |
2020年 | 9篇 |
2019年 | 12篇 |
2018年 | 16篇 |
2017年 | 12篇 |
2016年 | 25篇 |
2015年 | 17篇 |
2014年 | 22篇 |
2013年 | 33篇 |
2012年 | 36篇 |
2011年 | 55篇 |
2010年 | 23篇 |
2009年 | 24篇 |
2008年 | 38篇 |
2007年 | 49篇 |
2006年 | 50篇 |
2005年 | 39篇 |
2004年 | 41篇 |
2003年 | 38篇 |
2002年 | 29篇 |
2001年 | 8篇 |
2000年 | 5篇 |
1999年 | 5篇 |
1998年 | 4篇 |
1997年 | 9篇 |
1995年 | 4篇 |
1994年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1987年 | 1篇 |
1985年 | 2篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1979年 | 1篇 |
排序方式: 共有644条查询结果,搜索用时 0 毫秒
41.
Wheezy babies--wheezy adults? Review on long-term outcome until adulthood after early childhood wheezing. 总被引:1,自引:0,他引:1
Population-based birth cohort studies have documented that about 30% of children suffer from wheezing during respiratory infection before their third birthday. Recurrent wheezing is common in early childhood, but most patients outgrow their symptoms by school age. However, recent long-term postbronchiolitis follow-up studies from Sweden and Finland have revealed that asthma is present in about 40% of young adults and over half of the cases are relapses after many symptom-free years. In population studies, the principal predictors for later asthma have been parental asthma, recurrent wheezing, atopy and eosinophilia. In the Swedish postbronchiolitis study, atopic diathesis through the development of clinical atopy, and early passive smoking through bronchial hyper-reactivity or later active smoking led to adult asthma. The Finnish postbronchiolitis follow-up stressed early recurrence of wheezing, wheezing induced by less invasive viruses than respiratory syncytial virus (RSV), early-life atopy and eosinophilia and parental asthma as predictors for adult asthma. CONCLUSION: The majority of wheezing infants and children outgrow their symptoms by school age, but based on recent long-term follow-up studies, asthma relapses are common in young adults. These studies have highlighted parental asthma, maternal smoking and wheezing induced by other viruses than RSV as predictive factors for later asthma. 相似文献
42.
Felicitas Becker Julian Schubert Pasquale Striano Anna-Kaisa Anttonen Elina Liukkonen Eija Gaily Christian Gerloff Stephan Müller Nicole Heußinger Christoph Kellinghaus Angela Robbiano Anne Polvi Simone Zittel Tim J. von Oertzen Kevin Rostasy Ludger Schöls Tom Warner Alexander Münchau Anna-Elina Lehesjoki Federico Zara Holger Lerche Yvonne G. Weber 《Journal of neurology》2013,260(5):1234-1244
Recent studies reported mutations in the gene encoding the proline-rich transmembrane protein 2 (PRRT2) to be causative for paroxysmal kinesigenic dyskinesia (PKD), PKD combined with infantile seizures (ICCA), and benign familial infantile seizures (BFIS). PRRT2 is a presynaptic protein which seems to play an important role in exocytosis and neurotransmitter release. PKD is the most common form of paroxysmal movement disorder characterized by recurrent brief involuntary hyperkinesias triggered by sudden movements. Here, we sequenced PRRT2 in 14 sporadic and 8 familial PKD and ICCA cases of Caucasian origin and identified three novel mutations (c.919C>T/p.Gln307*, c.388delG/p.Ala130Profs*46, c.884G>A/p.Arg295Gln) predicting two truncated proteins and one probably damaging point mutation. A review of all published cases is also included. PRRT2 mutations occur more frequently in familial forms of PRRT2-related syndromes (80–100 %) than in sporadic cases (33-46 %) suggesting further heterogeneity in the latter. PRRT2 mutations were rarely described in other forms of paroxysmal dyskinesias deviating from classical PKD, as we report here in one ICCA family without kinesigenic triggers. Mutations are exclusively found in two exons of the PRRT2 gene at a high rate across all syndromes and with one major mutation (c.649dupC) in a mutational hotspot of nine cytosines, which is responsible for 57 % of all cases in all phenotypes. We therefore propose that genetic analysis rapidly performed in early stages of the disease is highly cost-effective and can help to avoid further unnecessary diagnostic and therapeutic interventions. 相似文献
43.
44.
45.
Erika Lyytikäinen Marjo Kaasila Eija Hiltunen-Back Matti Lehtinen Kaisa Tasanen Heljä-Marja Surcel Pentti Koskela Jorma Paavonen 《BMC infectious diseases》2008,8(1):169
Background
Reported rates of Chlamydia trachomatis are on the rise contradicting the declining rates of C. trachomatis associated reproductive sequelae in Western countries. Population based evaluation of the real trend of C. trachomatis infection is important to contemplate prevention efforts. We studied C. trachomatis occurrence during the past 20 years in Finland comparing incidence rate data based on serology and reported C. trachomatis laboratory notifications. 相似文献46.
Eija H Olsson Erkki Tukiainen 《Nordisk plastikkirurgisk forening [and] Nordisk klubb for handkirurgi》2005,39(1):33-38
We present our three-year experience of late breast reconstruction with conventional free TRAM flaps in 16 consecutive patients in a Swedish county hospital. The breast reconstruction was done unilaterally in 14 and bilaterally in two, giving a total of 18 free TRAM flaps in 16 patients. Six patients developed anastomotic or systemic thromboembolic events during or after the operation' three developed during the operation, and one required reoperation for postoperative thrombosis. No flaps were lost. Three patients developed deep venous thrombosis (DVT) or pulmonary embolism (PE) postoperatively; the two patients with DVT were later found to be resistant to activated protein C. The patient with a PE had developed multiple metastases by one year postoperatively. We compared the six patients who developed anastomotic and systemic thromboembolic events with those whose operations were uncomplicated and no significant differences were found either in their characteristics or overall events during operation. 相似文献
47.
A traumatic brain injury (TBI) extensively affects the injured person's daily life. Research based on the perspectives of people with TBI can increase understanding of the challenges they face and the possibility of supporting them in managing their lives. The aim of this study was to elucidate the meaning of living with TBI as narrated by the people with moderate or severe TBI. The data were collected by means of qualitative research interviews with 12 participants who had lived with TBI for 4-13 years. A phenomenological hermeneutic method was used to interpret the transcribed interviews. The study showed that people with TBI had lost their way and struggled to achieve a new normalcy. Losing one's way included experiences of waking up to unknown, missing relationships and experiencing the body as an enemy. Participants' struggles to attain a new normalcy included searching for an explanation, recovering the self, wishing to be met with respect, and finding a new way of living. Living with TBI seems to mean living with a perpetually altered body that changed the whole life and caused deep suffering, where feelings of shame and dignity competed with each other. Participants seem to be quite alone in their suffering and need more support from healthcare professionals. 相似文献
48.
A 2-year follow-up on the clinical and microbiological conditions of periodontium in teenagers 总被引:1,自引:0,他引:1
Sirkka Asikainen Satu Alaluusua Eija Kleemola-Kujala 《Journal of clinical periodontology》1991,18(1):16-19
87 teenagers were included in a 2-year follow-up study on clinical and microbiological conditions of the periodontium. The clinical status was determined according to the Community Periodontal Index of Treatment Needs (CPITN) for subjects under 20 years of age. 59% of the subjects had at least 3 healthy sextants at the baseline and 68% at the 2-year examination. The microbiological conditions were assessed by using direct dark-field microscopy, and the culture of Actinobacillus actinomycetemcomitants (A.a.). Subgingival bacterial samples were taken, 2 for the microscopy and 2 for the culture, from the mesial surfaces of the first molars of each subject. The presence of gingival bleeding after probing was separately recorded from the 2 sites sampled for dark-field microscopy. No gingival bleeding at these 2 sites was found at the 2-year examination in 55% of those subjects who were non-bleeding at baseline, in 46% of the subjects initially with 1 bleeding site and in 13% of the subjects with both sites bleeding at baseline. 55% of the subjects with neither fusiforms, motile rods nor spirochetes at baseline maintained their healthy flora for 2 years. A.a. was recovered in 4 subjects at baseline and in 5 subjects 2 years later, in 3 of them at both examinations. Longer follow-up periods are needed to reveal the significance of the constant recovery of A.a. from the same subjects. 相似文献
49.
Jürgen Breul Eija Lundström Daniela Purcea Werner P. Venetz Patrick Cabri Pascale Dutailly Evan R. Goldfischer 《Advances in therapy》2017,34(2):513-523
Introduction
Androgen deprivation therapy (ADT) is a mainstay of treatment against advanced prostate cancer (PC). As a treatment goal, suppression of plasma testosterone levels to <50 ng/dl has been established over decades. Evidence is growing though that suppression to even lower levels may add further clinical benefit. Therefore, we undertook a pooled retrospective analysis on the efficacy of 1-, 3-, and 6-month sustained-release (SR) formulations of the gonadotropin-releasing hormone (GnRH) agonist triptorelin to suppress serum testosterone concentrations beyond current standards.Methods
Data of 920 male patients with PC enrolled in 9 prospective studies using testosterone serum concentrations as primary endpoint were pooled. Patients aged 42–96 years had to be eligible for ADT and to be either naïve to hormonal treatment or have undergone appropriate washout prior to enrolment. Patients were treated with triptorelin SR formulations for 2–12 months. Primary endpoints of this analysis were serum testosterone concentrations under treatment and success rates overall and per formulation, based on a testosterone target threshold of 20 ng/dl.Results
After 1, 3, 6, 9, and 12 months of treatment, 79%, 92%, 93%, 90%, and 91% of patients reached testosterone levels <20 ng/dl, respectively. For the 1-, 3-, and 6-month formulations success rates ranged from 80–92%, from 83–93%, and from 65–97% with median (interquartile range) serum testosterone values of 2.9 (2.9–6.5), 5.0 (2.9–8.7), and 8.7 (5.8–14.1) ng/dl at study end, respectively.Conclusion
In the large majority of patients, triptorelin SR formulations suppressed serum testosterone concentrations to even <20 ng/dl. Testosterone should be routinely monitored in PC patients on ADT although further studies on the clinical benefit of very low testosterone levels and the target concentrations are still warranted.50.
Nina Tamminen Pia Solin Margaret M. Barry Lasse Kannas Eija Stengård Tarja Kettunen 《International Journal of Mental Health Promotion, The》2016,18(4):177-198
This study explored and clarified the nature and characteristics of the concept of mental health promotion. The study also investigated how these characteristics appear in current policies and strategies. A total of 30 scientific articles and policy documents were identified and analysed using Rodgers’s systematic evolutionary concept analysis method. The analysis provided valuable information on the attributes, related concepts, antecedents, consequences and references of mental health promotion, indicating that the concept is a distinct concept comprising a unique set of attributes and characteristics. A concept mapping of mental health promotion was subsequently developed. The analysis and the concept mapping provide health professionals, policy-makers and researchers with a framework, upon which well-grounded mental health promotion practice and evaluation research can be based. 相似文献