| Immunologic basis of antigen-induced airway hyperresponsiveness | Annual Review of Immunology | 1999 | 927 |
| Consistent viral evolutionary changes associated with the progression of human immunodeficiency virus type 1 infection | Journal of Virology | 1999 | 790 |
| Adjusting for Nonignorable Drop-Out Using Semiparametric Nonresponse Models | Journal of the American Statistical Association | 1999 | 570 |
| The looming threat of bioterrorism | Science | 1999 | 417 |
| Persistence of viremia and the importance of long-term follow-up after acute hepatitis C infection | Hepatology | 1999 | 380 |
| Reliability of the migraine disability assessment score in a population-based sample of headache sufferers | Cephalalgia | 1999 | 369 |
| Double blind, cluster randomised trial of low dose supplementation with vitamin A or beta carotene on mortality related to pregnancy in Nepal. The NNIPS-2 Study Group | BMJ: British Medical Journal | 1999 | 342 |
| Sexual orientation and risk of suicide attempts among a representative sample of youth | JAMA Pediatrics | 1999 | 323 |
| HIV transmission through breastfeeding: a study in Malawi | JAMA - Journal of the American Medical Association | 1999 | 255 |
| Annual summary of vital statistics--1998 | Pediatrics | 1999 | 233 |
| Equitable access to cancer services | Cancer | 1999 | 212 |
| Racial differences in the prevalence of age-related macular degeneration: the Baltimore Eye Survey | Ophthalmology | 1999 | 211 |
| Carbon monoxide provides protection against hyperoxic lung injury | American Journal of Physiology - Lung Cellular and Molecular Physiology | 1999 | 210 |
| Effect of vitamin A supplementation on morbidity due to Plasmodium falciparum in young children in Papua New Guinea: a randomised trial | Lancet, The | 1999 | 176 |
| Breast and cervix cancer screening among multiethnic women: role of age, health, and source of care | Preventive Medicine | 1999 | 165 |
| Interior surface materials in the home and the development of bronchial obstruction in young children in Oslo, Norway | American Journal of Public Health | 1999 | 153 |
| Fatal nontraffic injuries involving alcohol: A metaanalysis | Annals of Emergency Medicine | 1999 | 152 |
| PSOC in community context: Multi-Level correlates of a measure of psychological sense of community in low-income, urban neighborhoods | Journal of Community Psychology | 1999 | 151 |
| Urinary 1-hydroxypyrene and other PAH metabolites as biomarkers of exposure to environmental PAH in air particulate matter | Toxicology Letters | 1999 | 144 |
| Development of cancer chemopreventive agents: oltipraz as a paradigm | Chemical Research in Toxicology | 1999 | 138 |
| Experience of primary care by racial and ethnic groups in the United States | Medical Care | 1999 | 138 |
| Family Demography, Social Theory, and Investment in Social Capital | Population and Development Review | 1999 | 137 |
| Fractures of the femoral shaft in children. Incidence, mechanisms, and sociodemographic risk factors | Journal of Bone and Joint Surgery - Series A | 1999 | 132 |
| Interventions to Improve Intake of Complementary Foods by Infants 6 to 12 Months of Age in Developing Countries: Impact on Growth and on the Prevalence of Malnutrition and Potential Contribution to Child Survival | Food and Nutrition Bulletin | 1999 | 130 |
| Bcl-2-mediated drug resistance: inhibition of apoptosis by blocking nuclear factor of activated T lymphocytes (NFAT)-induced Fas ligand transcription | Journal of Experimental Medicine | 1999 | 129 |
