title: When S pneumoniae is penicillin-resistant.
authors.forename: T Q
authors.initials: TQ
authors.lastname: Tan
mesh_terms: D006801:Humans; D010403:Penicillin Resistance; D011008:Pneumococcal Infections / Q000628:therapy; D013296:Streptococcus pneumoniae / Q000187:drug effects*