Evidence-Based Complementary and Alternative Medicine / 2013 / Article / Fig 1

Research Article

Concurrent Use of Hypnotic Drugs and Chinese Herbal Medicine Therapies among Taiwanese Adults with Insomnia Symptoms: A Population-Based Study

Figure 1

Flowchart of recruitment of subjects with insomnia from the 1 million random sample of the National Health Insurance Research Database (NHIRD) from 2002 to 2008 in Taiwan.