Perform a growth promotion test as a positive control. 進行一個生長促進試驗作為陽性對照。
In histological examination of spleen, germinal centers were not observed in the positive control group, but were observed in the sample group. 陽性對照組脾臟病理表現為脾小體的生髮中心消失,醫用熱硫化硅橡膠組變化不明顯。