**Author details**

Biruk Getahun1 \* and Abebe Ayalew Bekel<sup>2</sup>

1 Department of Medical Physiology, School of Medicine, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia

2 Department of Human Anatomy, School of Medicine, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia

\*Address all correspondence to: birukkgetahun@gmail.com

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