Stewart B, Lepola P, Egger GF, Ali F, Allen AJ, Croker AK, Davidson AJ, Dicks P, Faust SN, Green D, Hovinga C, Klein AV, Langham R, Nakamura H, Pioppo L, Ramroop S, Sakiyama M, Sanchez Vigil de la Villa I, Sato J, Snyder DL, Turner MA, Zaidi S, Zimmerman K, Lacaze-Masmonteil T
El-Saadany H, El-Saadany H, Tharwat S, Soliman W, Shereef SE, Elhefny A, Yehia A, El-Shebini E, Khalil N, El-Hindawy A, Hammam N, El-Saman A, Ali F, Elwan S, Gheita TA, Egyptian College of Rheumatology IgG4 Study group