A cost-benefit analysis on the specialization in departments of obstetrics and gynecology in Japan.

Health Econ Rev · 2012 · PMC3402928 · PMID 22828120

Europe PMC DOI

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a decreasing trendno p-value reported

Their prediction indicates that there will be a decreasing trend in the next 40 years, especially after 2030.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.