Observational Methods
Relation between consumption of sugar-sweetened drinks and childhood obesity: a prospective, observational analysis
Observation Method
Observational Method
Observation Methods
Effect of lipid-lowering therapy on early mortality after acute coronary syndromes: an observational study
Antiretroviral therapy to prevent HIV transmission in serodiscordant couples in China (2003–11): a national observational cohort study
The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: Guidelines for reporting observational studies
Early assessment of cancer outcomes in New York City firefighters after the 9/11 attacks: an observational cohort study