medium (CiCM) were as follows: Poly-ethylene glycol (PEG) [M.W. 15000-25000, nacalai
tesque]: CiCM 0.5-1 mg/ml; polyvinyl alcohol (PVA) [M.W. 146000-186000, Sigma-Aldrich]:
CiCM 0.5-1 mg/ml; polyvinylpyrrolidone (PVP) [M.W. 360000, Sigma-Aldrich]: CiCM 1 mg/ml;
dextran (Dex) [M.W. 190000-230000, nacalai tesque]: CiCM 1 mg/ml; poly-γ-glutamic acid
(PGA) [M.W. 200000-500000, Wako Pure Chemical industry]: CiCM 1 mg/ml; chondroitin sulfate
C sodium salt (CSC) [M.W. 40000-80000,Wako Pure Chemical industry]: CiCM 0.5 mg/ml;
hyaluronic acid sodium salt (HRL) [M.W. not determined, Wako Pure Chemical industry]: CiCM
0.5 mg/ml; chondroitin sulfate A sodium salt (CSA) [M.W. 40000-80000, Sigma-Aldrich]: CiCM
0.5 mg/ml; dermatan sulfate sodium salt (DS) [M.W. 85000~100000, Tokyo Chemical Industry]:
CiCM 0.5 mg/ml; poly-L-lysine hydrobromide (PLL) [M.W. 30000-70000, Sigma-Aldrich] CiCM
5-50 μg/ml; poly-L-ornithine hydrobromide (PLO) [M.W. 30000-70000, Sigma-Aldrich]: CiCM
12.5 μg/ml; poly-D-lysine hydrobromide (PDL) [M.W. 30000-70000, Sigma-Aldrich]: CiCM 12.5
μg/ml; poly-L-histidine (PLH) [M.W. 5000-25000, Sigma-Aldrich]: CiCM 12.5 μg/ml.