Epidemiology

Explain the two major types of bias. Identify a peer-reviewed epidemiology article that discusses potential issues with bias as a limitation and discuss what could have been done to minimize the bias (exclude articles that combine multiple studies such as meta-analysis and systemic review articles). What are the implications of making inferences based on data with bias? Include a link to the article in your reference. 

Great article on identifying and avoiding bias in research

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2917255/.