[1] Univ Gondar, Coll Med & Hlth Sci, Sch Med, Dept Human Physiol, Gondar, Ethiopia
[2] Ambo Univ, Coll Med & Hlth Sci, Dept Human Physiol, Ambo, Ethiopia
[3] Univ Gondar, Coll Med & Hlth Sci, Sch Nursing, Dept Neonatal Nursing, Gondar, Ethiopia
[4] Univ Gondar, Coll Med & Hlth Sci, Sch Med, Dept Internal Med, Gondar, Ethiopia
[5] Univ Gondar, Inst Publ Hlth, Coll Med & Hlth Sci, Dept Environm & Occupat Hlth & Safety, Gondar, Ethiopia
[6] Univ Gondar, Coll Med & Hlth Sci, Sch Midwifery, Dept Gen Midwifery, Gondar, Ethiopia