2.3 Treatment Protocol
All the patients received following therapy: 1) oral prednisolone at a dose of 1mg/kg per day in the first week of therapy; 2) extract of ginkgo biloba leaves intravenous injection (i.v) at a dose of 20 ml per day; 3) oral mecobalamin tablets at a dose of 0.5mg three times a day; 4) batroxobin i.v at a dose of 10BU for the first time and 5BU every other day; 5) intratympanic corticosteroids at a dose of 40mg every other day in the second week if patients did not meet the criteria of CR following treatment with oral prednisolone.