The 4^th Royan International Twin Congress
International Invited Speakers

Paul Devroy, Md, PhD (Belgium)

Arne Sunde, PhD (Norway)

Semra Kahraman (Turkey)

Frank Pellestor, PhD (France)

Erick Y. Sato, PhD (Japan)

Nikolas Sofikitis, Md (Greece)

Hans R. Scholer, PhD (USA)

Esmail Behboodi, PhD (USA)

Masood Khatamee, MD (USA)