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Posted by kidu123 on 30 Apr 2019 at 08:33 GMT

We the authors would further like to acknowledge Nagoya University of Japan and the Tigray regional health bureau in Ethiopia for participating in the data collection and supervision process and making the original data set available for further analysis". Nagoya University has financed the collection of the original data. Nagoya University has no role in manipulation of the data in this particular article.

No competing interests declared.