Anti-muscarinic 3 Abs are assoc w/ severe GI Dz in systemic Sclerosis. 132 SSc pts (enrich for GI Sxs) - 39% had anti-M3R Abs; 25% high-titer M3R+. Hi titer M3R+ pts had more diffuse Dz (44% vs 23%), GI severity (91% vs 70%), RNPC3+ (18% vs 6%), U1RNP+(21 vs 2%) https://t.co/j8ZWFY4fgx