Detection of nontoxic BoNT/A levels in post-facial Botox injection breastmilk - Gu, Helene; Xu, Zhenyu; Koviazina, Renata; Tan, Pengcheng; Zheng, Changcheng; Kappes, Ferdinand; Kotsifaki, Domna G.; Shen, Fangrong; Tsigkou, Anastasia (Frontiers in Drug Safety and Regulation, 2025)