From the ∗Division of Internal Medicine, Japan Agricultural Cooperatives Kochi Hospital, Nankoku

†Department of General Thoracic Surgery, Kochi Health Sciences Center

‡Department of Internal Medicine, Japanese Red Cross Kochi Hospital

§Department of Diagnostic Pathology, Kochi Health Sciences Center, Kochi

∥Department of Community Medicine for Respirology, Graduate School of Biomedical Sciences, Tokushima University, Tokushima, Japan.

Received for publication November 15, 2022; revision accepted February 23, 2023.

Conflicts of interest and sources of funding: none declared.

Correspondence to: Tsutomu Shinohara, MD, PhD, Department of Community Medicine for Respirology, Graduate School of Biomedical Sciences, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan. E-mail: [email protected].