^aDepartment of Internal Medicine, Infectious and Tropical Diseases, University Clinics of Kinshasa, Kinshasa, Democratic Republic of the Congo (DRC)

^bBiostatistics and Medico-economic Information Department, University Hospital of Liege, Belgium

^cDepartment of Internal Medicine and Infectious Diseases, Liège University Hospital, Liège, Belgium

^dAIDS reference laboratory, University of Liège, Liège, Belgium.

Correspondence to Nadine Mayasi Ngongo, Liège, Belgium. e-mail: [email protected];GillesDarcis,e-mail:[email protected]

Received 14 October, 2020

Revised 30 November, 2020

Accepted 30 November, 2020