Update README.md

README.md

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 # `Cohorts`
 
-![](https://www.google.com/imgres?imgurl=https%3A%2F%2Fcdn.pixabay.com%2Fphoto%2F2017%2F05%2F12%2F19%2F28%2Fperson-from-dots-2307944_960_720.png&imgrefurl=https%3A%2F%2Fpixabay.com%2Fvectors%2Fperson-from-dots-2307944%2F&docid=VXlgcGhMEQ5NSM&tbnid=Pv_DVqrLT9cZtM%3A&vet=10ahUKEwitkZzTsOLhAhXHnuAKHYaEAvQQMwhrKAAwAA..i&w=360&h=720&bih=713&biw=1288&q=personalized%20medicine&ved=0ahUKEwitkZzTsOLhAhXHnuAKHYaEAvQQMwhrKAAwAA&iact=mrc&uact=8)
+![](https://marksmanhealthcare.com/wp-content/uploads/2018/09/Health-Economics-of-Personalized-Medicine-.png)
 
 
 [![Build Status](https://travis-ci.com/ngiangre/cohorts.svg?branch=master)](https://travis-ci.com/ngiangre/cohorts)