[1] Assiut Univ, Fac Med, Rheumatol Dept, Assiut, Egypt
[2] Mil Acad, Agouza Rheumatol Ctr, Rheumatol Dept, Giza, Egypt
[3] Cairo Univ, Fac Med, Rheumatol Dept, Cairo, Egypt
[4] Sohag Univ, Fac Med, Rheumatol Dept, Sohag, Egypt
[5] Ain Shams Univ, Fac Med, Internal Med Dept, Rheumatol Unit, Cairo, Egypt
[6] Fayoum Univ, Fac Med, Rheumatol Dept, Al Fayyum, Egypt
[7] Tanta Univ, Fac Med, Rheumatol Dept, Gharbia, Egypt
[8] Mansoura Univ, Fac Med, Rheumatol Dept, Dakahlia, Egypt
[9] Suez Canal Univ, Fac Med, Rheumatol Dept, Ismailia, Egypt
[10] Al Azhar Univ, Fac Med, Rheumatol Dept, Assiut, Egypt
[11] Beni Suef Univ, Fac Med, Internal Med Dept, Rheumatol Unit, Bani Suwayf, Egypt
[12] Benha Univ, Fac Med, Rheumatol Dept, Kalyoubia, Egypt
[13] Kafr El Sheikh Univ, Fac Med, Dept Pediat, Kafr Al Sheikh, Egypt
[14] Mansoura Univ, Fac Med, Internal Med Dept, Rheumatol & Immunol Unit, Dakahlia, Egypt
[15] Minia Univ, Fac Med, Rheumatol Dept, Al Minya, Egypt
[16] Alexandria Univ, Fac Med, Rheumatol Dept, Alexandria, Egypt
[17] Beni Suef Univ, Fac Med, Rheumatol Dept, Bani Suwayf, Egypt
[18] Ain Shams Univ, Fac Med, Rheumatol Dept, Cairo, Egypt
[19] Al Azhar Univ, Fac Med Girls, Internal Med Dept, Rheumatol Unit, Cairo, Egypt
[20] Egyptian Atom Energy Author EAEA, Internal Med Dept, Rheumatol Unit NCRRT, Cairo, Egypt
[21] Al Azhar Univ, Fac Med, Rheumatol Dept, Damiette, Egypt
[22] Damietta Univ, Fac Med, Rheumatol & Rehabil Dept, Dumyat, Egypt