Serum only (7 replicates): PW020606_5ul_serum_03.dat PW020606_5ul_serum_05.dat PW020606_5ul_serum_07.dat PW020606_5ul_serum_09.dat PW020606_5ul_serum_11.dat PW020606_5ul_serum_13.dat PW020606_5ul_serum_15.dat Spike-in to serum (7 replicates): PW020606_5ul_serum_1pmol_ptn_cal_std_02.dat PW020606_5ul_serum_1pmol_ptn_cal_std_04.dat PW020606_5ul_serum_1pmol_ptn_cal_std_06.dat PW020606_5ul_serum_1pmol_ptn_cal_std_08.dat PW020606_5ul_serum_1pmol_ptn_cal_std_12.dat PW020606_5ul_serum_1pmol_ptn_cal_std_14.dat PW020606_5ul_serum_1pmol_ptn_cal_std_16.dat