LTA and myalgic encephalomeyelitis/chronic fatigue syndrome: Among all participants, tear LT-α levels correlated positively with T-BUT (r = 0.607) and negatively with OSDI score (r = − 0.565), NIH eye score (r = − 0.628), and CFS (r = − 0.608) (P < 0.001 for all), whereas in oGVHD subpopulations, LT-α level exhibited no significant correlations with all these ocular surface parameters.