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. 2018 Oct 31;3(5):e000895. doi: 10.1136/bmjgh-2018-000895

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© Author(s) (or their employer(s)) 2018. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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PRISMA flow diagram of included and excluded articles. AMED, Allied and Complementary Medicine Database; CINAHL, Cumulative Index to Nursing and Allied Health Literature.