请问PPD是什么?
所有跟帖:
• 回复:皮试 -laoyueyue- ♀ (0 bytes) () 12/31/2008 postreply 15:50:36
• Purified protein derivative (the PPD skin test for tuberculosis) -闽姑- ♀ (0 bytes) () 12/31/2008 postreply 17:27:55
• 回复:皮试 -laoyueyue- ♀ (0 bytes) () 12/31/2008 postreply 15:50:36
• Purified protein derivative (the PPD skin test for tuberculosis) -闽姑- ♀ (0 bytes) () 12/31/2008 postreply 17:27:55