Fig. 4From: Free thyroxine level is associated with both relapse rate and poor neurofunction in first-attack Neuromyelitis Optica Spectrum Disorder (NMOSD) patientsSmoothed scatter plot showing the correlation between the serum FT4 level and the risk of NMOSD relapse. The inflection point of FT4 level was 12.01 pmol/LBack to article page