Original sentence: Approximately 35% to 40% of persons with secondary syphilis have asymptomatic Central nervous system (CNS) involvement, as demonstrated by any of these on Cerebrospinal fluid (CSF) examination:
Edited sentence: Approximately 35% to 40% of persons with secondary syphilis have asymptomatic Central nervous system (CNS) involvement, as demonstrated by any of these on Cerebrospinal fluid (CSF) examination:-