In addition, a growing variety of clinics (18-20%) are now run by medical facilities or physician groups, who utilize or hire their own center and administrative personnels or use existing company facilities to serve the worker population. Finally, an increasing variety of companies are getting involved in shared, multi-employer clinics, located either on one company's location or centrally situated.The supplier will develop, staff and manage the center either at the request of a group of employers or will obtain employers in a defined geographic location. No matter the design utilized, it's crucial that employer stay engaged in supplier choice, center oversight, strategic and policy instructions. Staffing practices vary from one onsite clinic to another, though over 60% of facilities are led by a Nurse Professional or Physician's Assistant.