MeSH term
Count
Twin Studies
Seroepidemiologic Studies
*Seroepidemiologic Studies
*Multicenter Studies
*Sampling Studies
*Intervention Studies
*Cohort Studies
*Longitudinal Studies
*Epidemiologic Studies
Intervention Studies
Epidemiologic Studies
Evaluation Studies
Feasibility Studies
Cohort Studies
Follow-Up Studies
Prospective Studies
Retrospective Studies
Sampling Studies
Longitudinal Studies
Multicenter Studies
Cross-Over Studies
Multicenter Studies/*trends
*Case-Control Studies
Time and Motion Studies
Organizational Case Studies
Cross-Sectional Studies
Multicenter Studies/standards
*Time and Motion Studies
Case-Control Studies
Multicenter Studies/statistics & numerical data