4A is short for 4Anesthesiology. 4A is a free email service that gives you a weekly overview of the last published abstracts of original articles, trials and reviews in four leading medical journals in the field of anesthesiology, Current Opinion in Anesthesiology, Anesthesiology, British Journal of Anaesthesia and Anesthesia & Analgesia. It's easy to do and knowledge is for everyone, so sign up now.