It looks like you are using an older version of Internet Explorer which is not supported. We advise that you update your browser to the latest version of Microsoft Edge, or consider using other browsers such as Chrome, Firefox or Safari.


If you ask certain rappers or hip hop artists, chronic is something green and only legal in some countries. In medicine, however, chronic means something that presents a long duration. It’s a word usually reserved for a disease that gradually gets worse over time, like MS.