8048
The porphyrin profiles of P . acnes may be a more accurate reflection of radiation risk to the patient than other biodosimeters / biomarkers such as gene up - / down - regulation , which may be non - specific due to patient related factors such as autoimmune diseases .
 Chemical: porphyrin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: porphyrin