Scalable depression monitoring with smartphone speech using a multimodal benchmark and topic analysis. - Daniel Emden; Maike Richter; Astrid Chevance; Ramona Leenings; Julian Herpertz; Lara Gutfleisch; Anna Fleuchaus; Rogério Blitz; Vincent Holstein; Janik Goltermann; Nils R. Winter; Jennifer Spanagel; et al. (npj Digit. Medicine, 2026)