“…One line of research is to combine this with the use of hepatocytes perfusion system (Rozga et al, 1993;Sussman et al, 1994). Another approach is to combine this with artificial cells containing hepatocytes or stem cells (Chang, 2007a(Chang, , 2007b(Chang, , 2007c(Chang, , 2007d(Chang, , 2010(Chang, , 2014Liu and Chang, 2005, 2006a, 2006b, 2009, 2012.…”