MS1(POS+NEG+QC)

The file name A represents the negative ion modes of MS1 in idiopathic membranous nephropathy (IMN) group and A (1) represents the positive ion modes of MS1 in IMN group. The file name N represents the negative ion modes of MS1 in healthy control (HC) group and N(1) represents the positive ion modes of MS1 in HC group. The file name QC represents the quality control of  negative ion modes in two groups and QC(1) represents the quality control of  positive ion modes in two groups.