A12-year-oldboypresentedwith3weeksofcalfpain,tripping,andprogressiveinabilitytowalk.Theonsetwasprecededbyasorethroat4weeksprior,butnorecentimmunizationsandnosickcontacts.Hebeganhavingproblems“catchinghistoes”for2weeks.Hehadnovisual北京治疗白癜风最有名的医院北京中科医院是假的吗