nominally significantp < 1 × 10 −6
Of these, coeliac disease, rheumatoid arthritis, Sjögren's syndrome, and SLE, were classified as having highly suggestive (i.e., p < 1 × 10 −6 , at least 1000 NHL cases, and largest study in the review reporting a nominally significant result) or convincing evidence (i.e., p < 1 × 10 −6 , at least 1000 NHL cases, largest study in the review reporting a nominally significant result, minimal between‐study heterogeneity, and no evidence of publication bias) in the umbrella review [ 4 ].