Post 9: Image references

Image 1: 

Borgman J. Random Medical News Cartoon.  Cincinnati Inquirer. 1997 April 27

Image 2: 

Academy Health (US). Health Services Research Methods [internet]. Washington (DC); 2008 [updated 2012; cited May 9 2015]. Available from http://www.hsrmethods. org/Glossary/Terms/C/Cross%20Sectional%20Study.aspx

Image 3: 

Kumar R Khan AM Chatterjee P. Research Methodology: Types of observational studies in medical research. 2014;1(2):154-159

Image 4:

Kumar R Khan AM Chatterjee P. Research Methodology: Types of observational studies in medical research. 2014;1(2):154-159

Image 5:

Cham J. The Science News Cycle Cartoon [internet].  PhD Comics Deeper and Higher; [updated May 18 2009; cited 2015 May 3]. Available from http://www.phdcomics .com/comics/archive.php?comicid=1174