Lundberg IE, Tjärnlund A, Bottai M, et al. 2017 European League Against Rheumatism/American College of Rheumatology classification criteria for adult and juvenile idiopathic inflammatory myopathies and their major subgroups. Ann of Rheum Dis 2018;76:1955–64.

The sentence on page 1957, right column:

Probability of IIM including muscle biopsy=1/[1+exponential(5.33–score)]

or,

Probability of IIM without muscle biopsy=1/[1+exponential(6.49–score)]

should read as:

Probability of IIM without muscle biopsy=1/[1+exponential(5.33–score)]

or,

Probability of IIM including muscle biopsy=1/[1+exponential(6.49–score)]