Reference Sites for Anaesthesiology & Critical Care

There are several online learning hub for Anesthesiologists and Intensivists. Anesthesia as a branch of modern medicine has been expanded a lot - it now covers pain medicine, critical care medicine, perioperative medicine and what not, as most critically ill patients land on ICU. 

The list is not complete. 

This post also contains recommended books for Anesthesiology PG course.