The Collaborative National Quality and Efficacy Registry for Scleroderma: association of medication use on gastrointestinal tract symptoms in early disease and the importance of tobacco cessation. - Luebker S; Frech TM; Assassi S; Gordon JK; Bernstein EJ; Steen VD; Shah AA; Hummers LK; Richardson C; Khanna D; Castelino FV; Chung L; et al. (Clinical and experimental rheumatology, 2023)