1. Sparse factors for the positive and negative syndrome scale: Which symptoms and stage of illness?. Issue 3 (28th February 2015) Authors: Anderson, Ariana; Wilcox, Marsha; Savitz, Adam; Chung, Hearee; Li, Qingqin; Salvadore, Giacomo; Wang, Dai; Nuamah, Isaac; Riese, Steven P.; Bilder, Robert M. Journal: Psychiatry research Issue: Volume 225:Issue 3(2015) Page Start: 283 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗