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. 2017 Mar 9;17:90. doi: 10.1186/s12888-017-1254-x

Fig. 1.

Fig. 1

Prevalence of long-term psychotropic drug use among adults aged 60–79 years in Germany. National Health Interview and Examination Surveys GNHIES98 (1997–99) and DEGS1 (2008–11)