Sleep difficulty by occupation: a Korean nationwide survey

• Heuy Sun Suh,
• In Cheol Hwang,
• Hong Yup Ahn

Affiliations

Heuy Sun Suh

Department of Family Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea

In Cheol Hwang

Department of Family Medicine, Gil Medical Center, Gachon University College of Medicine, Incheon, Republic of Korea

Hong Yup Ahn

Department of Statistics, Dongguk University, Seoul, Republic of Korea