1 University of Ghana Medical School, Rheumatology Unit Department of Medicine and Therapeutics, Korle bu Teaching Hospital, Accra, Ghana. Electronic address: dzifakay@gmail.com.
2 Department of Rheumatology, Inkosi Albert Luthuli Central Hospital, School of Clinical Medicine, College of Health Science, University of Kwa-Zulu Natal, eThekwini, South Africa.
3 Department of Rheumatology, School of Clinical Medicine, University of KwaZulu-Natal, Durban, South Africa.
4 Rheumatology Department, Royal National Hospital for Rheumatic Diseases, Bath, UK.
5 Faculty of Medicine, Dentistry and Health, University of Sheffield, Sheffield, UK.
6 Tanta University Faculty of Medicine, Tanta, Egypt.
7 DDivision of Rheumatology, Department of Medicine, Stellenbosch University, Tygerberg Academic Hospital, Stellenbosch, South Africa.
8 Rheumatology Unit, Department of Internal Medicine and sub Specialties Faculty of Medicine and Biomedical Sciences, The University of Yaoundé, Yaoundé, Cameroon.
9 Department of Medicine, University of Jos, Jos, Nigeria.
10 Department of Rheumatology, Victoria Hospital, Mauritius.
11 Department of Pediatrics and Child Health, Aga Khan University Medical College East Africa, Nairobi, Kenya.
12 Toamasina University Faculty of Medicine, Madagascar.
13 Lagos State University Teaching Hospital, Lagos State University College of Medicine, Ikeja, Nigeria.
14 Hospital Central de Maputo, Maputo, Mozambique.
15 Department of Internal Medicine, Rheumatology unit, University of Kinshasa, University Hospital of Kinshasa, Kinshasha, DR Congo.
16 Rabta Hospital, University Tunis El Manar, Tunis, Tunisia.
17 Department of Internal Medicine and Medical Specialties, CHU of Libreville, University of Health Sciences, Librevilla, Gabon.
18 University Félix Houphouet-Boigny, Abidjan, Côte d'Ivoire.
19 Faculty of Medicine of Cheikh Anta Diop University, Dakar, Senegal.
20 Centre Hospitalier Universitaire du Point G, Bamako, Mali.
21 Rheumatology Unit, Temara Hospital Center, Temara, Morocco; Laboratory of Biostatistics, Clinical Research and Epidemiology, Faculty of Medicine and Pharmacy, Mohammed V University, Rabat, Morocco.