Cal phase iii trial. The trial will be carried out at heidelberger ionenstrahl-therapie (hit) centre as monocentric trial. cheap viagra online Proton therapy is the gold standard in the treatment of skull base chordomas. buy generic viagra However, high-let beams such as carbon ions theoretically offer biologic advantages by enhanced biologic effectiveness in slow-growing tumors. viagra pills for men side effects Up until now it was impossible to compare two different particle therapies, i. viagra coupon trial offer E. before and after pictures of viagra use Proton and carbon ion therapy directly with each other. The aim of this study is to find out, whether the biological advantages of carbon ion therapy mentioned above can also be clinically confirmed. trial samples of viagra Patients with skull base chordoma will be randomised to either proton or carbon ion radiation therapy. Viagra 50 mg reviews As a standard, patients will undergo non-invasive, rigid immobilization and target volume delineation will be carried out based on ct and mri data. The biologically isoeffective target dose to the ptv in carbon ion treatment (accelerated dose) will be 63 gy e ± 5% and 72 gy e ± 5% (standard dose) in proton therapy respectively. Local-progression free survival (lpfs) will be analysed as primary end point. viagra for sale Toxicity and survival are the secondary end points. before and after pictures of viagra use Also matters of interest are patterns of recurrence, prognostic factors and plan quality. cheap viagra   eligibility ages eligible for study:   18 years to 80 years genders eligible for study:   both accepts healthy volunteers:   no criteria inclusion criteria: karnofsky performance score ≥60% age >18 years and <80 years informed consent signed by the patient histological confirmation of chordoma with infiltration of the skull base. buy viagra online Exclusion criteria: inability to understand the aims of the study, no informed consent prior rt of skull base region other malignancies with disease-free interval < 5 years (excepting pre- cancerous lesions) participation in another trial pregnancy simultaneous cht or immunotherapy. cheap viagra online   contacts and locations please refer to this study by its clinicaltrials. buy viagra online Gov identifier: nct01182779 contacts contact: anna v. generic viagra Nikoghosyan, md +496221568202 anna. Nikoghosyan@med. Uni-heidelberg. viagra without a doctor prescription De contact: juergen debus, md, phd +496221568202 juergen. Viagra 20mg .rezeptfrei Debus@med. Uni-heidelberg. can u buy viagra london De locations germany university of heidelberg recruiting heidelberg, germany, 69120 principal investigator: juergen debus, md, phd             sub-investigator: anna v. before and after pictures of viagra use Nikoghosyan, md             sponsors and collaborators university of heidelberg investigators principal investigator: juergen debus, md phd university of. viagra for sale viagra dosage much viagra 5 mg alcohol best online sites generic viagra viagra and high blood pressure treatment viagra 30 day coupon viagra natural para hombres colombia viagra cheapest price canada golden root complex viagra