APOB and myeloid sarcoma: Furthermore, the serum levels of AOPPs were significantly positively correlated with the serum levels of PL in small dense LDL subclass 5 (LDL5-PL) in the HVs and subclass 6 (LDL6-PL) in the patients with MS, as well as with the serum levels of apoB in subclasses 4–6 (LDL4-apoB, LDL5-apoB, LDL6-apoB) in the HVs and in subclass 6 (LDL6-apoB) in the patients with MS.