2334
Attempts to recondition these barriers through the use of so called ' probiotics ' , normally applied to the gut , are rarely successful , and sometimes fail , as they are usually applied as adjunctive treatments , e . g . in parallel with heavy pharmaceutical treatment , not rarely consisting in antibiotics and chemotherapy .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None