TRIM21 and Sjogren syndrome: The small number of events additionally limits our ability to assess whether the strongest association is between MSA and pSS itself or between MSA and other pSS-associated factors, such as anti-Ro/SSA antibodies; it also limits our ability to assess whether MSA is associated specifically with pSS or with any Sjögren’s syndrome (primary or secondary), although our data strongly suggest the former.