Twenty-four hours after cell passage 3 visual fields were randomly chosen from each Petri dish. Cell count of Schwann cells began for the first time then conducted it at the same field every day.

• 细胞传代后24h在每个培养皿中随机选取3个视野,开始初次细胞计数,以后在统一视野每天进行许旺细胞计数。