Effects of Scalable, Wordless, Short, Animated Storytelling Videos on Flu Vaccine Hesitancy in China: Nationwide, Single-Blind, Parallel-Group, Randomized Controlled Trial. - Chen, Wenjin; Jiao, Lirui; Chen, Qiushi; Zheng, Zhoutao; Geldsetzer, Pascal; Greuel, Merlin; Gates, Jennifer; Zhao, Jinghan; Bärnighausen, Till; Adam, Maya; Chen, Simiao; Wang, Chen (Journal of Medical Internet Research, 2025)