BW meaning in Medical ?

StarCraft: Brood War is the expansion pack for the military science fiction real-time strategy video game StarCraft. Released in December 1998 for Microsoft Windows and June 1999 for Mac OS, it was co-developed by Saffire and Blizzard Entertainment. The expansion pack introduces new campaigns, map tilesets, music, extra units for each race, and upgrade advancements. The campaigns continue the story from where the original StarCraft ended, with the sequel, StarCraft II: Wings of Liberty, continuing from the conclusion of Brood War. The expansion was released first in the United States on December 18, 1998.

Brood War was critically well received, with reviewers praising it for being developed with the care of a full game rather than as an uninspired extra. As of May 31, 2007, StarCraft and Brood War have sold almost ten million copies combined. The game is especially popular in South Korea, where professional players and teams have participated in matches, earned sponsorships, and competed in televised matches.

As of April 19, 2017, StarCraft and its Brood War expansion, aka the Anthology, are free to download and play from Blizzard's website. A remastered edition of StarCraft and its expansion was released on August 14, 2017.