8785
The clinical and laboratory features of 72 children with Henoch - Schonlein purpura ( HSP ) were examined to determine if there were associations between the laboratory indices - - including white blood cell ( WBC ) counts , serum C - reactive protein ( CRP ) levels , platelet ( PLT ) counts - - and the clinical manifestations of acute HSP .
 serum C - reactive protein, CRP
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 serum C - reactive protein, CRP