Serum PD-1 regulation and PD-1 expression of CD4+Foxp3+ regulatory T cells in patients in thyroid eye disease associated with immunosuppression treatment - Sakai, Atsushi; Tagami, Mizuki; Misawa, Norihiko; Haruna, Yusuke; Tomita, Mami; Honda, Shigeru (Frontiers in Ophthalmology, 2024)