TY - RPRT TI - Antigen polymorphism in Borrelia hermsii, a clonal pathogenic bacterium. AU - S M Rich AU - S A Sawyer AU - A G Barbour PY - 2001 DO - 10.1073/pnas.071042098 UR - https://pubmed.ncbi.nlm.nih.gov/11742066/ ID - 11742066 ER -