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Wada, Koji, Toru Yoshikawa, Takahisa Goto, Aizan Hirai, Eisuke Matsushima, Yoshifumi Nakashima, Rie Akaho, Michiko Kido, und Takashi Hosaka. National Survey of the Association of Depressive Symptoms With the Number of Off Duty and On-call, and Sleep Hours Among Physicians Working in Japanese Hospitals: A Cross Sectional Study. BioMed Central, 2010.

Wada, Koji, et al. National Survey of the Association of Depressive Symptoms With the Number of Off Duty and On-call, and Sleep Hours Among Physicians Working in Japanese Hospitals: A Cross Sectional Study. BioMed Central, 2010.