1. Bodey GP, Buckley M, Sathe YS, Freireich EJ: Quantitative relationship between circulating leucocytes and infection in patients with acute leukemia. Ann Int Med 64: 328, 1966.
2. Van der Meer JWM, Boekhout M, Alleman M: Infectious episodes in severely granulocytopenic patients. Infection 7: 171, 1979.
3. Johanson WG, Pierce AK, Sanford JP: Changing pharyngeal bacterial flora of hospitalized patients. Emergence of Gram-negative bacilli. New Engl J Med 281: 1137, 1969.
4. Pollack M, Charache P. Nieman RE, Jett MP, Reinhardt JA, Hardy PH: Factors influencing colonisation and antibiotic-resistance patterns in Gram-negative bacteria hospital patients. Lancet 2: 688, 1972.
5. Van der Waay D, De Vries JM, Lekkerkerk JEC: Colonisation resistance of the digestive tract in conventional and antibiotic treated mice. J Hyg (Lond) 69: 405, 1971.