level of PS(O-20:0/22:4(7Z,10Z,13Z,16Z)) in blood serum (OBA_2045045) is the amount of a PS(O-20:0/22:4(7Z,10Z,13Z,16Z)) when measured in blood serum. Also known as: blood serum PS(O-20:0/22:4(7Z,10Z,13Z,16Z)) amount.