World Federation of Orthodontists (WFO) |
World Federation of Orthodontists (WFO)
Dr. Yen as an invited speaker and made a presentation in the 7th IOC meeting of the WFO, January, 2010 at Sydney, Australia
The certificate of Dr. Yen’s presentation in the 2010 World Federation of Orthodontists 7th IOC meeting at Sydney, Australia.
Dr. Yen as an invited speaker and made a presentation in the 8th IOC meeting of the WFO, September, 2015 at London, UK.
The certificate of Dr. Yen’s presentation in the 2015 World Federation of Orthodontists 8th IOC meeting at London, United kingdom .
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