Doctor Gustaf VanHowzen is a level 48 first aid trainer located on the ground floor of Foothold Citadel on Theramore Isle, in the contested territory of Dustwallow Marsh. In addition to teaching artisan level first aid skill, he teaches how to create Heavy Mageweave Bandages at 240+, Runecloth Bandages at 260+ skill and Heavy Runecloth Bandages at 290+ skill for free.
See List of Dustwallow Marsh NPCs.
Quests[]
He starts the quest 
[45] Triage, which was once necessary to acquire artisan proficiency.
Trivia[]
His name is possibly a reference to the television character Dr. House, seeing as 'Howzen' is close to the German word for house: Haus.