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Robinson, P. and Lowe, J. (2015), Literature reviews vs systematic reviews. Australian and New Zealand Journal of Public Health, 39: 103. doi:10.1111/1753-6405.12393
Hastings, C., & Fisher, C. A. (2014). Searching for proof: Creating and using an actionable PICO question. Nursing Management, 45(8), 9-12. doi:10.1097/01.NUMA.0000452006.79838.67