MERTK and mantle cell lymphoma: Even though survival analysis indicated that MerTK expression had little effect on OS and PFS of MCL patients who received R-CHOP-like regimens, median OS of the MerTK-positive group (36.5 months) was shorter than the 53.2 months of the MerTK-negative group, which indicated that MCL patients with MerTK expression may experience shorter OS.