O. Essien

发表

A. Udoh, O. Essien, I. Ntui, 2007 .

A. Udoh, I. Bassey, U. Akpan, 2019, International journal of applied & basic medical research.

V. Ansa, O. Essien, A. Oyo-Ita, 2008, East African medical journal.

A. Udoh, I. Bassey, I. Isong, 2015, Journal of clinical and diagnostic research : JCDR.