________ The OSHA Hazard Communication Standard (HCS) requires that employers disclose toxic and hazardous substances in the workplace

Which of the following is cheiloplasty NOT used for?

a. To remove hyperkeratosis. b. To enlarge thin lips. c. To fix a cleft palate. d. To create a cupid's bow mouth.

Diphtheria is an example of a recombinant vaccine.

a. true b. false