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: We conclude that ( 1 ) short - term treatment with massive doses of steroids induced severe respiratory and limb muscle wasting ; ( 2 ) both types of steroids induced predominantly type IIb atrophy , resulting in the expected alterations in diaphragm contractile properties ; ( 3 ) neither steroid caused muscle necrosis ; ( 4 ) type IIb atrophy was not caused by acute nutritional deprivation alone .
### Output Text:
We conclude that ( 1 ) short - term treatment with massive doses of <span class="chemical">steroids</span> induced severe respiratory and limb muscle wasting ; ( 2 ) both types of <span class="chemical">steroids</span> induced predominantly type IIb atrophy , resulting in the expected alterations in diaphragm contractile properties ; ( 3 ) neither <span class="chemical">steroid</span> caused muscle necrosis ; ( 4 ) type IIb atrophy was not caused by acute nutritional deprivation alone . 