1. Repeated immunizations: possible adverse cffccts;CS, III, White; WH, Adles; VG, McGann;Ann Intern Med,1974
2. Diseasc Control. Influcnza vaccine 1980-1981;for, Center
3. Primary duodenal tumours;Charles, R.N.; Kelley, M.L.; Campeti, F.;Arch Intern Med,1963
4. Endoscopic polypectomy: upper gastrointestinal tract;Seifert, E.;Clin Gastroenterol,1978