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This prospective, randomized study will evaluate the performance of the Osseotite Certain Prevail implant when compared to that of the non-lateralized version of the implant. Study (null) hypothesis: the crestal bone changes that take place after placement and loading of the Oss…

The objective of this study is to evaluate whether certain proteins, expressed in biological tissues can indict a better understanding of the effect of drugs that are used to treat rejection, and of processes leading to rejection and rejection-free outcomes.

The purpose of this study is to determine any functional outcome differences in patients who have undergone surgical treatment for ankle osteoarthritis using surveys, step counts, and laboratory gait analysis. This study is closed to recruitment; follow-up procedures are complet…

Parkinson's disease (PD) is the most frequent neurodegenerative disease with a prevalence of 2% over 65 years and because of this high prevalence as the population ages, it is a major problem of public health. An exhaustive repertory of not only parkin mutations in autosomal rec…

CRiALS is an umbrella protocol through which people are recruited to participate in a range of research studies being conducted by the ALS Research Collaboration (ARC).

Intra-articular injection of etanercept in patient suffering from rheumatoid arthritis: a double-blind randomized study for evaluation of efficacy and safety of etanercept versus intra-articular steroid injection in acute synovitis (knee,wrist,ankle,elbow)

Transitions from peritoneal dialysis to hemodialysis are common during kidney replacement therapy and may be associated with adverse outcomes. However, the incidence, predictors, and outcomes of PD-to-HD transitions at a national level remain incompletely characterized. This stu…

To elucidate the mechanisms by which type 1 diabetes-associated genes; IFIH1, TYK2, IKZF4, as well as total genetic risk, impart functional immunoregulatory abnormalities that result in expansion of self-reactive adaptive immune cells, defective regulatory/effector mechanisms in …

Chronic neck pain after whiplash injury is a common and disabling condition that can significantly affect quality of life, daily activities, and psychological well-being. In some patients, pain persists for months or years despite conservative treatments, leading to consideration…

Peroperative opioids are known to induce N-Methyl-D-Aspartate dependent enhancement of postoperative hyperalgesia. For patients with current opioid treatment, these phenomena could be exagerated and could produce greater postoperative opioid consumption and higher pain score. Sin…

Many people develop intolerance to light after a head injury, leading to ambient light levels causing discomfort. We do not fully understand why this occurs and how it should be treated. A growing number of clinicians have reported improvement in TBI related symptoms reported by …

This study will examine the effects of cortisol (hydrocortisone), melatonin, a combination of cortisol and melatonin, and placebo (an inactive substance) on jet lag symptoms. Jet lag is a term used to describe symptoms people commonly experience after rapid travel across several …

This study will evaluate: 1) whether computed tomography (CT) scanning is better than regular x-rays for measuring changes in the stiffness, or fusion, of the spine in patients with ankylosing spondylitis; and 2) if CT can be used to determine how fast extra bone forms in the spi…

The purpose of this study is to examine how people with a family history of colon cancer and other related cancers respond to recommendations for cancer screening after genetic counseling. The purpose of your participation would be to help us learn more about whether people with …

This laboratory study is looking at stored tumor samples in young patients with brain tumors. Studying samples of tumor tissue from patients with cancer in the laboratory may help doctors learn more about changes that occur in DNA and identify biomarkers related to cancer.

An appropriate hypothalamic-pituitary-adrenal (HPA) axis response is required to survive critical illness. Primary adrenal insufficiency, relative adrenal insufficiency, tissue resistance to glucocorticoids, ACTH deficiency and immune-mediated inhibition of the HPA axis may impai…

This study is a collection of data to evaluate safety and characterize progression of Paroxysmal Nocturnal Hemoglobinuria (PNH).

Background: * Chronic graft-versus-host disease (cGVHD) is a multi-organ alloimmune and autoimmune disorder that occurs following allogeneic hematopoietic stem cell transplantation (alloHSCT). It is characterized by immune dysregulation, immunodeficiency, impaired organ function…

The purpose of the MESA Lung Study is to assess the role of endothelial dysfunction and genetic susceptibility to subclinical COPD and emphysema.

The principal scientific objective of the trial is to identify the factors that are associated with differential blood pressure responses between drugs. This may allow investigators to produce new hypotheses on the pathophysiology of hypertension and on the mechanisms of drug act…