1. 1: Japan Society of Laser Surgery and Medicine <http//:www.jslsm.com/>
2. 2: Criteria for the accreditation as an instructional institution by the Oto-Rhino-Laryngological Society of Japan
3. 3: Clinical Practice Guidelines for Head and Neck Cancers, 2009 edition (Edited by Japan Society for Head and Neck Cancer, Published by Kanehara Shuppan, Japan)
4. 4: General Rules for Clinical Studies on Head and Neck Cancers: 4th revised edition, October, 2005 (Edited by Japan Society for Head and Neck Cancer, Published by Kanehara Shuppan, Japan)
5. 5: Japan Industrial Standards: JIS C6802: 1997 (Safety Standards for Laser Products)