Health-related quality of life in ANCA-associated vasculitis and item generation for a disease-specific patient-reported outcome measure oleh Robson JC, Dawson J, Cronholm PF, Milman N, Kellom KS, Ashdown S, Easley E, Farrar JT, Gebhart D, Lanier G, McAlear CA, Peck J, Luqmani RA, Shea JA, Tomasson G, Merkel PA