International  HTA Institutions 

- Health Technology Assessment international ( HTAi ) - HERE

- ISPOR - Health Technology Assessment in Evidence-Based Health Care Reimbursement Decisions Around the World: Lessons Learned - HERE

- Directory of Health Technology Assessment organizations Worldwide - HERE

- ISPOR Health Technology Assessment Roundtables - HERE

- WHO - Health technology assessment - HERE 

The International Network of Agencies for Health Technology Assessment - HERE 

U.S. National Library of Medicine

National Information Center on Health Services Research and Health Care Technology (NICHSR) - HERE