Weldon AJ, Moldovan I, Cabling MG, Hernandez EA, Hsu S, Gonzalez J, Parra A, Benitez A, Daoud N, Colburn K, Payne KJ. Surface APRIL Is Elevated on Myeloid Cells and Is Associated with Disease Activity in Patients with Rheumatoid Arthritis. J Rheumatol. 2015 May;42(5):749–59. PMID: 25729037; PMCID: PMC4506783.