About the Authors

Chioma Stella Ejekam

Contributed equally to this work with: Chioma Stella Ejekam, Ifeoma Peace Okafor, Chimezie Anyakora, Ebenezer A. Ozomata

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing

chioma.s.ejekam@gmail.com

Affiliation Department of Community Health, Lagos University Teaching Hospital, Lagos, Nigeria

Ifeoma Peace Okafor

Contributed equally to this work with: Chioma Stella Ejekam, Ifeoma Peace Okafor, Chimezie Anyakora, Ebenezer A. Ozomata

Roles Formal analysis, Methodology, Supervision, Writing – original draft, Writing – review & editing

Affiliation Department of Community Health and Primary care, College of Medicine, University of Lagos, Akoka Lagos, Nigeria

Chimezie Anyakora

Contributed equally to this work with: Chioma Stella Ejekam, Ifeoma Peace Okafor, Chimezie Anyakora, Ebenezer A. Ozomata

Roles Data curation, Funding acquisition, Methodology, Resources, Writing – original draft, Writing – review & editing

Affiliation Promoting the Quality of Medicines Program, U.S. Pharmacopeial Convention, Rockville, Maryland, United States of America

Ebenezer A. Ozomata

Contributed equally to this work with: Chioma Stella Ejekam, Ifeoma Peace Okafor, Chimezie Anyakora, Ebenezer A. Ozomata

Roles Conceptualization, Formal analysis, Methodology, Supervision, Writing – original draft

Affiliation Department of Community Health, Lagos University Teaching Hospital, Lagos, Nigeria

Kehinde Okunade

Roles Conceptualization, Resources, Supervision, Writing – review & editing

‡ These authors also contributed equally to this work.

Affiliation Department of Obstetrics and Gynaecology, Lagos University Teaching Hospital, Lagos, Nigeria

Sofela Ezekiel Oridota

Roles Formal analysis, Methodology, Supervision, Writing – review & editing

‡ These authors also contributed equally to this work.

Affiliations Department of Community Health, Lagos University Teaching Hospital, Lagos, Nigeria, Department of Community Health and Primary care, College of Medicine, University of Lagos, Akoka Lagos, Nigeria

Jude Nwokike

Roles Funding acquisition, Methodology, Writing – review & editing

‡ These authors also contributed equally to this work.

Affiliation Promoting the Quality of Medicines Program, U.S. Pharmacopeial Convention, Rockville, Maryland, United States of America

Competing Interests

The authors of this manuscript have read the journal's policy and the following competing interests: CSE, EAO, IPO, KO and SEO are employees of Lagos University Teaching Hospital, Nigeria. CA and JN are employees of the United States Pharmacopeial Convention (USP) working on the Promoting the Quality of Medicines (PQM) Program. This does not alter our adherence to PLOS ONE policies on sharing data and materials.