You are currently an epidemiologist employed by the PDPH to investigate the etiology of a specific disease. You are tasked with designing a case-control study on Human papilloma virus (a sexually transmitted infection) and its association with subsequent oropharyngeal cancer (cancer of the mouth, esophagus, or pharynx). Your population is:

People living in Chicago Ages 35 and 60

Please answer the following questions (there are 4 parts, a-d, please label and answer each part):

(a) State how you might identify and recruit your cases

(b) State how you might identify and recruit your controls.

(c) List ONE potential source of selection bias. Briefly explain how this type of bias may occur (given the specific study design) and how you plan to prevent/minimize it in your study

(d) List TWO potential sources for information bias. Briefly explain how these types of biases may occur (given the study design) and how you plan to prevent/minimize them in your study.