All of the above. 12-9 c. using speculative information to infer something about the known. Environmental risk is a well-understood entity. Cross-sectional studies look at the exposure and disease at the same time. Bias is a problem primarily of Clinical Trials.
Subchronic studies are shorter than Acute studies.
Case Control Studies start with the exposure and follow for the disease. Case Control Studies are good for rare diseases. Clinical Trials look at dose-response in animals. 10.Dose refers to the amount of a substance in the environment. Describe the four steps involved in the process of Risk Analysis.