Mapping the network of persistent somatic symptoms across diseases: Cross-sectional and longitudinal analyses from the SOMACROSS research unit. - Strahl A; Maehder K; Toussaint A; Hasenbank N; Schramm C; Lohse AW; Shedden Mora M; Huber TB; Schneider SW; Ständer S; Nestoriuc Y; von dem Knesebeck O; et al. (Journal of psychosomatic research, 2026)