In addition, a growing variety of clinics (18-20%) are now run by medical facilities or doctor groups, who use or employ their own clinic and administrative staffs or make use of existing supplier centers to serve the worker population. Finally, an increasing number of employers are taking part in shared, multi-employer clinics, located either on one employer's place or centrally situated.The supplier will build, personnel and manage the facility either at the demand of a group of companies or will obtain companies in a defined geographic area. Regardless of the design utilized, it's crucial that company remain engaged in company choice, center oversight, strategic and policy direction. Staffing practices differ from one onsite clinic to another, though over 60% of centers are led by a Nurse Specialist or Physician's Assistant.