Which of the following aren't included in the WHO classification of operating dental auxiliaries?
Dental hygienist
School dental nurses
Therapists
Denturists
Non-operating auxiliaries

Dental surgery assistant
Dental secretary/receptionist
Dental laboratory technician
Dental health educator

Operating auxiliaries

School dental nurse
Dental therapist
Dental hygienist
Expanded function dental auxiliaries

Essentials of preventive and community dentistry 
Soben Peter 
5th edition