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Boehm, K., Raak, C., Vollmar, H. C. and Ostermann, T. (2010), An overview of 45 published database resources for complementary and alternative medicine. Health Information & Libraries Journal, 27: 93–105. doi:10.1111/j.1471-1842.2010.00888.x
Boehm and Raak evaluated CAM databases available in the US and Europe in 2010. Of the 45 databases in their review, these are some of the resources that were still available at their original links in August 2020: