The most extensive study and analyses has been based on data from two prospective cohort groups, often referred to as the Harvard Six-City study (Dockery et al.
These cohort groups may not be as representative as initially thought.
mnli hypothesis: These cohort groups may not be as representative as initially thought. premise: The most extensive study and analyses has been based on data from two prospective cohort groups, often referred to as the Harvard Six-City study (Dockery et al.