english: See e.g., Lin et al., 2002; Wang et al., 2003; Gao et al., 2002; Han et al., 2001; Pai et al., 1999, each of which is incorporated by reference in its entirety.
non_english: Ang et al., 2002; Ang dan Sim, 1997; Ang dan Lee, 2002; Ang et al., 2004; Lin et al., 2001; Chan et al., 2009