Barriers to recruitment and retention of postpartum women with hypertensive disorders in pregnancy in Nigeria: lessons from the impact HDP study

Chibundo Onyia MDᵃ; Cecilia Nartey MD, MPHᵇ; Chukwuebuka F. Okoye MBBSᵃ; Kabiru Umar Ibrahim MBBSᵉ; Nura Abdulkarim MBBSᵈ; Adaego A. Orji MBBS, MPHᶠ; Michael Ochem MBBSᵃ; Ezinne M. Aba MBBSᵃ; Adedoyin E. Olowookere MBBSᵃ; Taiwo P. Odulana MBBSᵃ, Greatness Eyenorᵃ, Dennis Isah MBBSᵍ, Joshua Zaman MBBSᵍ; Dike B. Ojji MBBS, PhDᵃ,ᵍ; Zainab Mahmoud MD, MScᵇ,ᶜ Author Affiliations a Cardiovascular Research Centre, University of Abuja and University of Abuja Teaching Hospital, Gwagwalada, Abuja, Nigeria b Department of Medicine, Cardiovascular Division and Global Health Center, Washington University in St. Louis, St. Louis, Missouri, USA c Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, Missouri, USA d Murtala Muhammad Specialist Hospital, Kano, Nigeria e Aminu Kano Teaching Hospital, Kano, Nigeria f National Hospital Abuja, Federal Capital Territory Abuja, Nigeria g Faculty of Clinical Sciences, University of Abuja, Abuja, Nigeria