RT Book, Section A1 Waning, Brenda A1 Montagne, Michael SR Print(0) ID 2642545 T1 Chapter 3. Observational Study Designs T2 Pharmacoepidemiology: Principles and Practice YR 2001 FD 2001 PB The McGraw-Hill Companies PP New York, NY SN 9780071355070 LK accesspharmacy.mhmedical.com/content.aspx?aid=2642545 RD 2024/04/18 AB One of two major approaches in conducting epidemiological investigations involves observation of the disease, drug use problem, or other phenomenon of interest. The other major approach, called experimental epidemiology, is discussed in Chapter 4.