In addition, a growing number of clinics (18-20%) are now run by hospitals or doctor groups, who utilize or employ their own center and administrative staffs or use existing service provider facilities to serve the employee population. Finally, an increasing variety of companies are taking part in shared, multi-employer clinics, situated either on one employer's place or centrally situated.The supplier will construct, staff and handle the facility either at the demand of a group of employers or will get companies in a specified geographical area. Regardless of the design used, it's key that company remain taken part in supplier selection, center oversight, tactical and policy direction. Staffing practices vary from one onsite clinic to another, though over 60% of facilities are led by a Nurse Practitioner or Physician's Assistant.