Contactless monitoring of respiratory rate variability in rats under anesthesia with a compact 24GHz microwave radar sensor - Sun, Guanghao; Kurosawa, Masaki; Ninomiya, Yoshiki; Baba, Kohei; Son, Nguyen Huu; Yen, Hoang Thi; Suzuki, Satoshi; Kano, Yutaka (Frontiers in Veterinary Science, 2025)