Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Tomohiro Taniguchi and Mayu Yamamoto and Sonoko Miyoshi and Satomi Shimizu,Unilateral tonsillitis due to primary syphilis with gram-negative corkscrew-like spirochaetes confirmed by Gram stain of pus,BMJ Case Reports,1757-790X,BMJ,2024-02-01,17,,e258549,https://cir.nii.ac.jp/crid/1870021791644457344,https://doi.org/10.1136/bcr-2023-258549