Yamamoto, S., Kawamura, Y., Yamamoto, K., Yamaguchi, Y., Tamura, Y., Izawa, S., … Kasugai, K. (2021). Internet Survey of Japanese Patients With Chronic Constipation: Focus on Correlations Between Sleep Quality, Symptom Severity, and Quality of Life. Journal of Neurogastroenterology and Motility, 27(4), 602-611. https://doi.org/10.5056/jnm20135 (Original work published 2021)