Qin, W.; Cao, H.; Zhang, Z.; Nie, H.; Han, L.; Liu, X. Establishing Reference Values and Evaluating Diagnostic Utility of Scrotal Ultrasound for Azoospermia Subtypes: A Cross-Sectional Study in Guangdong, China. Ultrasound J 2026, 18 (1), 18307. https://doi.org/10.5826/tuj.2026.18307.