Relapses over time related with expression of <t>MIC-AB</t> (A), <t>ULBP-1</t> (B), ULBP-2 (C), ULBP-3 (D), ULBP-4 (E), and ULBP-5 (F) . X-axis represents patient follow-up in years; Y-axis represents cumulative relapses in %. Log-rank p-values are shown in each graph. Only expression of MIC-AB and ULBP-2 resulted in statistically significantly favorable relapse-free period (RFP).