Clinical Research Clinical Research Trials – Volunteers may be compensated for their time and travel.Current Enrolling Protocols:COPD (Chronic Obstructive Pulmonary Disease) 40 + year old diagnosed with Moderate to Severe COPDCurrent or former smokerEither: a) documented history of cardiovascular disease or coronary artery disease b) diabetes, hypertension or dyslipidemiaHas had at least 1 COPD exacerbation (flare-up) that required antibiotic or steriod treatment and/or hospitalization within the last 12 monthsDo not have asthma, cystic fibrosis, interstitial lung disease, bronchiectasis or pulmonary thromboembolic diseaseDo not have history of drug or alcohol abuse within the last 12 monthsHave not had diagnosis of cancer in the last 5 years (exception: basal or squamous cell skin cancer)Do not have uncontrolled infection resulting from HIV and/or active hepatitis Non-arteric Anterior Ischemic Optic Neuropathy (NAION) Males 40 years and olderHistory of erectile dysfunction at least 1 year prior to study enrollmentSudden visual loss in 1 eye within 45 days before entry to the studyNo history of multiple sclerosis or optic neuritisNo Evidence of temporal arteritisNo history of vasculitis or collagen vascular diseaseNo previous history of NAION Call (770) 507-8344 for further details or to pre-screen for one of our currently enrolling protocols.