I would like to express my deep thanks and great appreciations to Prof. Tangoku, Prof. Kondo, and Dr. Sakiyama for giving me the opportunity to go to the annual meeting of Japan Society for Respiratory Endoscopy in Yokohama. I wish to extend my sincere thanks and appreciations to all staff and secretary members of your great department for their great help and support for me.

It was a great pleasure for me to make oral presentation in highly specialized conference. I thoroughly enjoyed several excellent presentations with different speakers from Japan and other countries. It was the first time for me to visit Yokohama city. It is very nice city.

Abdellah Hamed Khalil Ali