3) Winkler, J. R. and Robertson, P. B.: Periodontal disease associated with HIV infection. Oral Surg Oral Med Oral Pathol 73: 145-150 1992.
4) Greenspan, J. S., Barr, C. E., et al.: Oral manifestatins of HIV infection. Oral Surg Oral Med Oral Pathol 73: 142-144 1992.
5) Phair J, Munoz A, et al.: The risk of Pneumocystis carinii pneumonia among men infectedwith human immunodeficiency virus Type 1. N Engl J Med 322: 161-165 1990.