Development and application of a quadruplex real-time PCR method for Torque teno sus virus 1, Porcine circovirus type 2, pseudorabies virus, and porcine parvovirus - Quan, Fushi; Geng, Yulu; Wu, Yang; Jiang, Faming; Li, Xuemei; Yu, Changqing (Frontiers in Cellular and Infection Microbiology, 2024)