1. The 5-point Investigator's Global Assessment (IGA) Scale: A modified tool for evaluating plaque psoriasis severity in clinical trials. (February 2015) Authors: Langley, Richard G. B.; Feldman, Steven R.; Nyirady, Judit; van de Kerkhof, Peter; Papavassilis, Charis Journal: Journal of dermatological treatment Issue: Volume 26:Number 1(2015:Feb.) Page Start: 23 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗