Department of Respiratory Medicine, Saitama Red Cross Hospital, Saitama, Japan
Corresponding author and requests for reprints: Shintaro Sato, MD
Department of Respiratory Medicine, Saitama Red Cross Hospital, 1-5 Shintoshin, Chuo-ku, Saitama 330-8553, Japan
Tel: +81-48-852-1111; Fax: +81-48-852-1132
E-mail: smallerss@hotmail.com