Numeric rating scale:Patients perceptions of its use in post operative pain assessments
http://www.appliednursingresearch.org/article/S0897-1897(13)00116-X/fulltext. this is the link to the nursing journal article to be critique. 11 references with at least 4 journal refs please and referrence list please.. All references to be not older than 6 years old. assignment word limit is 2500 words.