- Medical Director of Musicians’ Clinics of Canada.
- President of Performing Arts Medicine Association
- Prevention and treatment of injuries sustained by those in the performing arts.
- Innovative strategies and techniques to prevent and treat music related injuries.
Chasin, Marshall; Chong, John Localization problems with modified and non-modified ER-15 Musician’s Earplugs. The Hearing Journal, February 1999,52(2):38,40