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This protocol has not been successfully converted into a full Cochrane review within established timelines and for this reason has been withdrawn from Cochrane Library.
Lassi, Z. S., & Bhutta, Z. A. (2020). Mid-level health workers for improving the delivery of health services. Cochrane Database of Systematic Reviews, 2020(1). https://doi.org/10.1002/14651858.CD009649.pub2