In the sentence extracted from biomedical literature, identify all the chemical entities. The required answer format is the same sentence with HTML <span> tags to mark up specific entities. 
### Entity Markup Guides:
Use <span class="chemical"> to denote a chemical.

### Input Text: RESULTS : A total of 155 ( 75 . 6 % ) of 205 patients had thrombocytopenia before transplantation , significantly influenced by Model of End - Stage Liver Disease score and liver cirrhosis .
### Output Text:
RESULTS : A total of 155 ( 75 . 6 % ) of 205 patients had thrombocytopenia before transplantation , significantly influenced by Model of End - Stage Liver Disease score and liver cirrhosis . 