Figures & data
Figure 1 All published articles including keywords “sleep” and “insomnia” from 1990 to 2015.
Note: Data were obtained from Ovid-MEDLINE database.
![Figure 1 All published articles including keywords “sleep” and “insomnia” from 1990 to 2015.](/cms/asset/18770fde-3a0a-47e1-95b4-1455d7456135/dnss_a_138823_f0001_c.jpg)
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Figure 1 All published articles including keywords “sleep” and “insomnia” from 1990 to 2015.
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